Hand, foot, and mouth disease (HFMD) is highly contagious, and you can spread it to others from the very first day you feel symptoms — often before you even realize you have it. Most people are contagious for about 7 to 10 days total, from roughly 2 days before symptoms appear until the blisters and sores have completely healed. The tricky part is that you can shed the virus in your stool for several weeks after you recover, which means you may still be able to spread it even when you feel perfectly fine.
What Is Hand, Foot, And Mouth Disease Exactly?
Hand, foot, and mouth disease is a viral infection that causes painful sores in the mouth and a rash on the hands and feet. It is most common in children under 5 years old, but adults can catch it too. The name describes exactly where the symptoms show up.
The disease is caused by a group of viruses called enteroviruses. The most common one in the United States is coxsackievirus A16. Another strain, enterovirus 71, can cause more severe illness, though it is less common in the US. These viruses spread easily in places like daycare centers, schools, and households with young children.
Despite the similar name, hand, foot, and mouth disease is not related to foot-and-mouth disease, which affects livestock. The two are caused by completely different viruses and cannot be passed between humans and animals.
How Does The Virus Spread From Person To Person?
The virus lives in an infected person’s body fluids — saliva, mucus, blister fluid, and stool. You catch it by coming into contact with any of these and then touching your eyes, nose, or mouth.
Common ways it spreads include:
- Touching surfaces or objects that have the virus on them, like toys, doorknobs, or countertops
- Sharing cups, utensils, or towels with someone who is infected
- Kissing or hugging someone who has the virus
- Changing diapers or helping a child use the bathroom and then touching your face before washing your hands
- Touching the fluid from blisters or the sores themselves
The virus can survive on surfaces for several days, which is why it spreads so quickly in group settings. It is not spread through the air like a cold or flu — you need direct contact with the virus to get sick.
When Are You Contagious With Hand Foot And Mouth?
You are contagious from about 2 days before symptoms start until all the blisters and sores have completely healed. For most people, that means a contagious period of roughly 7 to 10 days.
The most contagious time is during the first week of illness, when you have active blisters and sores. The fluid inside those blisters is packed with virus. As the blisters dry up and scab over, the risk of spreading the virus drops significantly.
Here is what the timeline looks like:
- Days 1-2 before symptoms: You can spread the virus before you even know you are sick
- Days 1-7 of symptoms: This is when you are most contagious, especially while blisters are open or oozing
- After blisters heal: You are much less contagious, but the virus can still be in your stool
- Weeks 1-4 after recovery: You may still shed the virus in your stool, though the risk of spreading it this way is lower
People sometimes ask if they are still contagious after the fever breaks. The fever dropping is a good sign, but it is not the end of the contagious period. You are still contagious as long as you have active sores or blisters.
How Long Should You Stay Home?
Most doctors and public health agencies recommend staying home until you have been fever-free for 24 hours without using fever-reducing medication, and all blisters and sores have dried up and scabbed over. For many people, this works out to about a week after symptoms first appear.
For children, the same rule applies. Keep them home from daycare or school until the fever is gone for 24 hours and the mouth sores and blisters have healed. Many schools and daycare centers have their own policies, so check with them before sending your child back.
Some children with mild cases recover in 5 to 7 days. Others may take closer to 10 days. The key is not to rush back just because your child feels better — they can still spread the virus to others even if their energy is back.
Can You Get Hand, Foot, And Mouth More Than Once?
Yes, you can. There are several different viruses that cause hand, foot, and mouth disease. Having one strain does not protect you from the others.
Even the same strain does not guarantee lifelong immunity. The immune response after infection is not always strong enough to prevent reinfection, especially with different viral strains circulating in the community. Some children get it two or three times over the course of their early years.
Adults who had it as children can also catch it again. It tends to be less common in adults because many have built up some immunity over time, but it is absolutely possible.
Is It Dangerous For Adults Or Pregnant Women?
For most healthy adults, hand, foot, and mouth disease is unpleasant but not dangerous. Symptoms are often milder than in children, though some adults develop more severe symptoms like high fever and widespread rash.
Pregnant women face a specific concern. If you catch HFMD in the first trimester, there is some evidence of a small increased risk of certain birth defects, but the overall risk remains very low. If you catch it near delivery, there is a small chance of passing the virus to your newborn, which can cause a more serious illness in the baby.
If you are pregnant and have been exposed to someone with hand, foot, and mouth disease, contact your obstetrician. They can give you specific guidance based on your stage of pregnancy. The general recommendation is to avoid close contact with anyone who has the infection, especially during the first trimester and the final weeks before delivery.
What Are The Symptoms To Watch For?
Symptoms usually appear 3 to 6 days after exposure to the virus. This is called the incubation period.
Early symptoms often include:
- Fever
- Sore throat
- Feeling tired or run down
- Poor appetite
About 1 to 2 days after the fever starts, the characteristic symptoms appear. Painful red spots develop in the mouth, often on the tongue, gums, and inside the cheeks. These can turn into blisters that make eating and drinking uncomfortable. A rash of flat red spots or small blisters appears on the palms of the hands and soles of the feet. Some people also get the rash on their knees, elbows, or buttocks.
Not everyone gets every symptom. Some people only get mouth sores. Others only get the rash. A few people, especially adults, have no symptoms at all but can still spread the virus to others.
How Is It Treated And When Should You See A Doctor?
There is no specific medication that cures hand, foot, and mouth disease. It is a viral infection, so antibiotics do not help. Most people recover on their own within 7 to 10 days.
Treatment focuses on managing symptoms. Over-the-counter pain relievers like acetaminophen or ibuprofen can help with fever and discomfort. Cold foods like ice cream, yogurt, and smoothies can soothe mouth sores. Avoid acidic, salty, or spicy foods that can irritate the sores.
Dehydration is the main concern, especially in young children. If your child refuses to drink because of mouth pain, offer small amounts of fluid frequently. Watch for signs of dehydration like dry lips, fewer wet diapers, or dark urine. If you see these signs, call your doctor.
See a doctor if:
- The fever lasts more than 3 days
- Your child will not drink anything
- Symptoms get worse instead of better after a few days
- You or your child has a weakened immune system
- You are pregnant and have been exposed
In rare cases, hand, foot, and mouth disease can cause complications like viral meningitis or encephalitis. Seek emergency care if you or your child experiences a stiff neck, severe headache, confusion, or difficulty breathing.
How Can You Stop The Spread At Home?
Handwashing is the single most effective way to stop the spread. Wash your hands with soap and water for at least 20 seconds after changing diapers, wiping noses, or touching any blisters. Alcohol-based hand sanitizers work, but soap and water are better because the virus is not always easily killed by alcohol.
Clean and disinfect frequently touched surfaces. This includes doorknobs, light switches, toys, phones, and bathroom fixtures. A diluted bleach solution or disinfectant wipes that list effectiveness against enteroviruses work well.
Do not share cups, utensils, towels, or toothbrushes while someone in the house is sick. Wash bedding and clothing in hot water. Keep the sick person’s belongings separate from everyone else’s as much as possible.
Remember that the virus can live in stool for weeks after recovery. Continue careful handwashing after bathroom use for at least a month after the illness, even after everyone seems better.
Frequently Asked Questions
Can adults catch hand, foot, and mouth disease from children?
Yes, adults can catch it from children through direct contact with saliva, blister fluid, or stool. Symptoms in adults are often milder but can sometimes be more severe.
How long does the virus live on surfaces?
The virus can survive on surfaces for several days, especially in warm and moist environments. Regular cleaning with disinfectant reduces the risk of spread.
Is hand, foot, and mouth disease the same as foot-and-mouth disease?
No, they are completely different diseases caused by different viruses. Foot-and-mouth disease affects livestock and cannot be transmitted to humans.
Can my child go back to daycare if they feel better but still have scabs?
Once the blisters have dried and scabbed over and the fever has been gone for 24 hours, the child is no longer considered contagious. Scabs that are dry and not oozing do not spread the virus.
