Hand Washing for Kids: How to Wash Your Hands Properly

Medically reviewed | Last reviewed: | Evidence level: 1A
Washing your hands is one of the most important things you can do to stay healthy and prevent getting sick. Proper hand washing with soap and water for at least 20 seconds removes germs that can cause colds, flu, stomach bugs, and other illnesses. This guide teaches children and parents the correct hand washing technique recommended by the World Health Organization (WHO) and Centers for Disease Control and Prevention (CDC).
📅 Updated:
⏱️ Reading time: 8 minutes
Written and reviewed by iMedic Medical Editorial Team | Pediatric Health Specialists

📊 Quick Facts About Hand Washing

Recommended Duration
20 seconds
minimum with soap
Reduces Respiratory Illness
16-21%
according to CDC
Reduces Diarrheal Disease
23-40%
in community settings
Face Touches Per Hour
23 times
average in children
WHO Recommendation
40-60 sec
total hand washing time
Hand Sanitizer
60% alcohol
minimum for effectiveness

💡 Key Takeaways for Parents and Kids

  • 20 seconds minimum: Sing "Happy Birthday" twice while washing to ensure you wash long enough
  • Soap and water is best: More effective than hand sanitizer, especially when hands are visibly dirty
  • Don't forget the thumbs: Thumbs and fingertips are the most commonly missed areas
  • Key times to wash: Before eating, after toilet, after blowing nose, after playing outside
  • Dry hands completely: Wet hands spread germs more easily than dry hands
  • Make it fun: Use songs, games, and colorful soap to encourage good habits
  • Lead by example: Children learn best by watching adults wash their hands properly

Why Is Hand Washing So Important for Children?

Hand washing is the single most effective way to prevent the spread of infectious diseases. According to the CDC, proper hand washing can reduce respiratory infections by 16-21% and diarrheal diseases by 23-40%. Children are especially vulnerable because they touch their faces frequently (up to 23 times per hour) and play in close contact with others.

Our hands are constantly touching surfaces throughout the day - door handles, toys, phones, tables, and many other objects. Each of these surfaces may contain millions of invisible germs including bacteria and viruses that can make us sick. When we touch our face with contaminated hands, these germs can enter our body through our eyes, nose, and mouth, potentially causing infections.

Children are particularly at risk for several important reasons. First, their immune systems are still developing and learning to fight off infections, making them more susceptible to illnesses. Second, children naturally explore their environment by touching everything around them, which increases their exposure to germs. Third, young children often put their hands and objects in their mouths, providing a direct route for germs to enter their bodies. Finally, children spend significant time in group settings like schools and daycare centers where germs spread easily from person to person.

The scientific evidence supporting hand washing is overwhelming. A comprehensive meta-analysis published in the American Journal of Public Health found that hand hygiene education and promotion in community settings led to significant reductions in gastrointestinal and respiratory illnesses. The World Health Organization has designated hand hygiene as one of the most cost-effective health interventions available, estimating that improved hand washing could prevent approximately 1 million deaths per year globally.

What Germs Are Removed by Hand Washing?

Proper hand washing with soap and water removes or inactivates most common pathogens that cause illness in children. These include cold and flu viruses (rhinovirus, influenza), stomach bugs (norovirus, rotavirus), bacteria that cause food poisoning (Salmonella, E. coli), respiratory syncytial virus (RSV) which is particularly dangerous for young children, and COVID-19 coronavirus. The mechanical action of rubbing hands together with soap, combined with the chemical properties of soap molecules, effectively removes these pathogens from the skin surface.

Did You Know?

A single gram of human feces (about the weight of a paper clip) can contain one trillion germs. Even tiny, invisible amounts left on hands after using the toilet can spread these germs to food, toys, and other surfaces. This is why washing hands after using the toilet is absolutely essential for preventing illness.

When Should Kids Wash Their Hands?

Children should wash their hands at key moments throughout the day: before eating or preparing food, after using the toilet, after blowing their nose, coughing or sneezing, after playing outside, after touching animals, after coming home from school or public places, and whenever hands look or feel dirty.

Establishing a consistent hand washing routine is one of the most valuable health habits parents can teach their children. While it might seem like children should wash their hands constantly, focusing on key moments when germ transmission is most likely provides the greatest benefit without becoming overwhelming. Understanding when and why hand washing matters helps children internalize the habit and practice it even when parents aren't watching.

The most critical times for hand washing fall into two main categories: before activities where germs could enter the body, and after activities where hands are likely to become contaminated. Before eating is perhaps the most important time to wash hands, as any germs on the hands will be transferred directly to food and then ingested. This applies whether eating a formal meal at the table or having a quick snack - the risk of germ transmission is the same.

Critical Times for Hand Washing

Key moments when children should always wash their hands
Situation Why It's Important Germs Prevented
Before eating or handling food Prevents germs from entering the body through food Salmonella, E. coli, norovirus
After using the toilet Feces contain millions of bacteria and viruses Norovirus, rotavirus, hepatitis A
After blowing nose, coughing, sneezing Respiratory secretions spread easily to surfaces Cold viruses, flu, COVID-19
After touching animals or pets Animals carry germs even if they appear healthy Salmonella, Campylobacter, ringworm
After playing outside Soil and outdoor surfaces harbor many pathogens Soil bacteria, parasites
After coming home from school Shared surfaces at school are high-touch areas Various respiratory and GI pathogens

After using the toilet is equally critical. Even careful wiping can leave microscopic traces of fecal matter on hands, and these tiny amounts contain enough pathogens to cause illness. Studies have shown that hands can become contaminated during toilet use even when no visible soiling occurs. Teaching children to wash hands thoroughly every single time they use the toilet, without exception, establishes a habit that protects them and everyone around them.

How Do You Wash Your Hands Properly?

Proper hand washing involves five key steps: wet hands with clean water, apply soap and lather well, scrub all surfaces for at least 20 seconds (including backs of hands, between fingers, and under nails), rinse thoroughly under running water, and dry completely with a clean towel. The WHO recommends following specific hand rubbing motions to ensure all areas are cleaned.

While washing hands might seem simple, research shows that most people don't do it correctly. Studies observing hand washing behavior have found that many people wash for too short a time, skip important areas like thumbs and fingertips, or don't use soap at all. Understanding and practicing the correct technique ensures that hand washing actually removes the germs it's meant to remove.

The World Health Organization has developed a detailed hand washing technique that covers all surfaces of the hands systematically. This technique takes approximately 40-60 seconds when performed correctly and has been proven through scientific studies to effectively remove pathogens. While this may seem longer than the quick hand rinse many people perform, the extra time investment pays enormous dividends in terms of illness prevention.

Step-by-Step Hand Washing Guide

1

Wet Your Hands

Turn on the tap and wet your hands completely with clean, running water. The water temperature can be warm or cold - both work equally well for removing germs. The water helps spread the soap and creates the friction needed for effective cleaning.

2

Apply Soap

Apply enough soap to cover all surfaces of your hands. You can use liquid soap, bar soap, or foam soap - all types work equally well. The soap molecules help lift germs off the skin so they can be washed away.

3

Rub Palms Together

Rub your palms together vigorously to create a good lather. Make circular motions to ensure the soap covers all of both palms. This is the first area to clean because palms touch things most frequently.

4

Wash Backs of Hands

Place your right palm over the back of your left hand with fingers interlaced. Rub back and forth to clean the back of the left hand and between fingers. Repeat with the left palm over the right hand.

5

Clean Between Fingers

Interlace your fingers with palms together and rub back and forth. This cleans the spaces between all fingers where germs often hide. Twist your hands to reach all the spaces thoroughly.

6

Wash Your Thumbs

Clasp your left thumb with your right hand and rotate to clean all around the thumb. Repeat with the right thumb. Thumbs are one of the most commonly missed areas during hand washing!

7

Clean Fingertips and Nails

Rub the tips of your right fingers in a circular motion against your left palm. This cleans under your fingernails where lots of germs accumulate. Repeat with left fingertips against right palm.

8

Rinse Thoroughly

Rinse your hands thoroughly under clean, running water. Make sure to remove all soap and the germs it has loosened. Running water carries the germs away down the drain.

9

Dry Your Hands

Dry your hands completely using a clean towel, paper towel, or air dryer. Drying is important because wet hands transfer germs more easily than dry hands. Use the towel to turn off the faucet if possible.

Timing Tip for Kids!

Sing the "Happy Birthday" song twice while washing your hands - this takes about 20 seconds, which is the minimum recommended washing time. You can also count slowly to 20, recite the alphabet, or sing another favorite song that lasts about 20 seconds.

Is Hand Sanitizer as Good as Soap and Water?

Hand washing with soap and water is more effective than hand sanitizer in most situations, especially when hands are visibly dirty or greasy. However, alcohol-based hand sanitizer containing at least 60% alcohol is a good alternative when soap and water are not available. Hand sanitizer does not kill all types of germs, including norovirus and some bacteria.

The question of soap versus sanitizer is one that many parents face, especially when out and about where sinks may not be readily available. Understanding the strengths and limitations of each option helps families make the best choice for different situations. Both methods have their place in a comprehensive hand hygiene strategy.

Soap and water works through a combination of chemical and mechanical action. The soap molecules have a special structure with one end that attracts water and another end that attracts oils and fats. When you rub your hands with soap, these molecules surround germs and lift them off the skin surface. The friction from rubbing hands together further loosens germs, and the running water then carries everything away. This process is remarkably effective against almost all types of pathogens.

Hand sanitizer works differently, using alcohol to kill germs on contact. Alcohol damages the outer structure of bacteria and viruses, destroying them before they can cause infection. This method is fast and convenient - just apply and rub until dry. However, sanitizer has important limitations. It doesn't work well when hands are visibly dirty or greasy because the alcohol can't reach the germs through the layer of grime. Certain germs, particularly norovirus (a common cause of stomach bugs) and bacterial spores, are resistant to alcohol and not effectively killed by sanitizer.

When to Use Each Method

Comparing soap and water with hand sanitizer
Factor Soap and Water Hand Sanitizer
Effectiveness against most germs Excellent - removes almost all pathogens Good - kills most common germs
When hands are visibly dirty Works well - removes dirt and germs Less effective - can't penetrate dirt
Against norovirus Effective - removes virus particles Not effective - norovirus resistant to alcohol
Convenience Requires sink and water Portable, can use anywhere
Time needed 40-60 seconds (WHO recommendation) 20 seconds until dry
Important: Check the Alcohol Content

Not all hand sanitizers are effective. Look for products containing at least 60% alcohol (ethanol or isopropanol). Some sanitizers contain less alcohol or use non-alcohol antimicrobials that may be less effective. The alcohol percentage should be listed on the product label.

How Can I Teach My Child to Wash Hands Properly?

Teaching children to wash hands effectively involves making it fun, leading by example, establishing consistent routines, and providing age-appropriate explanations. Use songs to time washing, let children choose their own soap, create hand washing charts with rewards, and most importantly, wash your own hands properly so children see good technique modeled consistently.

Getting children to wash their hands properly and consistently can be challenging, especially for young children who may see it as boring or unnecessary. The key is making hand washing engaging while also helping children understand why it matters. Research on behavior change shows that habits are more likely to stick when they are associated with positive experiences and clear understanding of benefits.

Leading by example is perhaps the most powerful teaching tool available to parents. Children learn far more from watching what adults do than from listening to what adults say. When children see their parents and caregivers washing hands thoroughly at appropriate times, they internalize hand washing as a normal part of daily life. Make your own hand washing visible to children and narrate what you're doing: "I'm washing my hands before I start cooking dinner. Watch how I scrub between my fingers and under my nails!"

Making hand washing fun helps children look forward to rather than dread the activity. Singing songs provides both entertainment and a natural timer for adequate washing duration. The "Happy Birthday" song sung twice lasts about 20 seconds, but any song of similar length works well. Some families create their own hand washing songs, or children can choose a favorite song to sing each time. Colorful soaps, fun dispensers, and special towels can also make the experience more enjoyable.

Age-Appropriate Hand Washing Tips

Toddlers (1-3 years): Children this age need full assistance with hand washing but can begin learning the routine. Guide their hands through each step while naming the actions. Use a step stool so they can reach the sink comfortably. Keep hand washing time brief but thorough, as very young children have short attention spans. Praise their participation enthusiastically.

Preschoolers (3-5 years): Children can begin washing hands independently but need supervision and reminders. Post a colorful hand washing chart near the sink showing the steps. Let them choose their own soap to increase ownership of the activity. Practice the technique together regularly. Use timers or songs consistently so they learn proper duration.

School-age children (6-12 years): Children should be capable of proper hand washing independently. Help them understand the science behind why hand washing works and when it's most important. Discuss germs and how diseases spread in age-appropriate terms. Occasionally check their technique and provide gentle reminders rather than criticism. Model good behavior consistently as children this age are very observant of adult hypocrisy.

Make It Visual

A powerful demonstration for children: have them play with glitter, then try to wash it all off. The remaining glitter shows them how germs stick to hands and how thorough washing is needed to remove them. This visual lesson often makes a lasting impression!

What Are Common Hand Washing Mistakes?

Common hand washing mistakes include washing for too short a time (less than 20 seconds), missing areas like thumbs, fingertips, and between fingers, not using enough soap, not rinsing thoroughly, and not drying hands completely. Studies show that most people wash for only 6 seconds on average - far short of the recommended duration.

Understanding common mistakes helps both children and adults improve their hand washing technique. Observational studies of hand washing behavior have identified several consistent errors that reduce the effectiveness of hand washing. Being aware of these pitfalls allows for conscious correction and development of better habits.

The most prevalent mistake is simply not washing long enough. Multiple studies observing hand washing in public restrooms have found that the average person washes for only about 6 seconds - dramatically shorter than the 20-second minimum recommended by health authorities. This brief wash fails to remove most germs and provides a false sense of security. Using timing methods like songs ensures adequate duration becomes automatic.

Missing areas of the hands is another extremely common problem. Research using fluorescent markers to detect unwashed areas has consistently found that thumbs, fingertips, the backs of hands, and the spaces between fingers are frequently missed. The thumbs in particular seem to be "invisible" during hand washing - people simply forget to clean them. The step-by-step technique described earlier addresses this by systematically covering all hand surfaces.

Most Commonly Missed Areas

  • Thumbs: Often completely forgotten during washing
  • Fingertips and under nails: Where lots of germs accumulate
  • Back of the hands: People focus primarily on palms
  • Between fingers: Requires deliberate interlacing to clean
  • Wrists: Often missed especially when wearing long sleeves

Not using soap is surprisingly common, particularly in quick hand rinses. Plain water alone does remove some germs through mechanical action, but soap dramatically increases effectiveness by breaking down the oils that help germs stick to skin. Always use soap when washing hands, regardless of how rushed you feel.

Failing to dry hands thoroughly is often overlooked but matters significantly. Wet hands transfer germs much more easily than dry hands - up to 1000 times more easily according to some research. Take the extra few seconds to dry hands completely with a clean towel. Using a paper towel or clean cloth towel to turn off the faucet and open the bathroom door prevents immediate recontamination of clean hands.

What About Special Situations?

In special situations like when no sink is available, during illness outbreaks, or after certain activities, modified hand hygiene approaches may be needed. Hand sanitizer works well for on-the-go situations, but soap and water is essential after using the toilet, before eating, and when hands are visibly dirty. During illness, more frequent and thorough hand washing is recommended.

While the basic principles of hand washing remain constant, certain situations call for adapted approaches. Understanding how to maintain hand hygiene in various circumstances ensures protection continues even when ideal conditions aren't available. This practical flexibility is especially important for active families on the go.

When traveling or away from home, hand washing opportunities may be limited. This is when carrying alcohol-based hand sanitizer becomes particularly valuable. A small bottle of sanitizer in a backpack, purse, or car allows for hand cleaning after touching public surfaces like door handles, shopping carts, playground equipment, and public transit. However, remember that sanitizer is a backup - wash with soap and water as soon as possible, especially before eating and after using restrooms.

During cold and flu season or disease outbreaks, hand hygiene becomes even more critical. Increase hand washing frequency, particularly after being in public places. Be extra thorough about technique and duration. In these periods, also be more vigilant about not touching your face with unwashed hands, as this is how respiratory viruses typically enter the body.

After Certain Activities

Some activities require especially thorough hand washing: after handling raw meat or eggs (to prevent foodborne illness), after changing diapers (feces contain many pathogens), after caring for someone who is ill (to prevent spreading their illness), and after handling garbage or cleaning (various pathogens may be present).

Frequently Asked Questions About Hand Washing

Medical References and Sources

This article is based on current medical research and international guidelines. All claims are supported by scientific evidence from peer-reviewed sources.

  1. World Health Organization (2009). "WHO Guidelines on Hand Hygiene in Health Care: First Global Patient Safety Challenge Clean Care Is Safer Care." WHO Publications Comprehensive guidelines on hand hygiene technique and best practices.
  2. Centers for Disease Control and Prevention (2024). "When and How to Wash Your Hands." CDC Hand Hygiene Updated guidance on hand washing technique and timing.
  3. Aiello AE, et al. (2008). "Effect of hand hygiene on infectious disease risk in the community setting: A meta-analysis." American Journal of Public Health. 98(8):1372-1381. DOI: 10.2105/AJPH.2007.124610 Meta-analysis showing hand hygiene reduces respiratory illness by 16-21% and GI illness by 23-40%.
  4. UNICEF (2020). "Handwashing: A Healthy Habit in the Kitchen." Global guidance on promoting hand washing in children.
  5. Burton M, et al. (2011). "The effect of handwashing with water or soap on bacterial contamination of hands." International Journal of Environmental Research and Public Health. 8(1):97-104. Study comparing effectiveness of water alone vs soap and water.
  6. Kwok YL, et al. (2015). "Face touching: a frequent habit that has implications for hand hygiene." American Journal of Infection Control. 43(2):112-114. Research showing people touch their faces approximately 23 times per hour.

Evidence grading: This article uses the GRADE framework (Grading of Recommendations Assessment, Development and Evaluation) for evidence-based medicine. Evidence level 1A represents the highest quality of evidence, based on systematic reviews of randomized controlled trials and meta-analyses.

⚕️

iMedic Medical Editorial Team

Specialists in Pediatrics, Infectious Disease, and Public Health

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