Hand, foot, and mouth disease (HFM) has no antiviral cure, so treatment is entirely about managing symptoms at home while the virus runs its course, typically over 7 to 10 days. The priorities are controlling pain and fever, preventing dehydration, and keeping the skin clean. Most cases resolve without complications, but knowing what to watch for makes the difference between a rough week and a trip to the emergency room.
Managing Pain and Fever
Acetaminophen (Tylenol) and ibuprofen (Motrin, Advil) are the main tools for bringing down fever and easing the pain from mouth sores and skin blisters. Acetaminophen can be given every four hours, and ibuprofen every six hours for children older than 6 months. Many parents find the most relief comes from alternating the two every three hours: acetaminophen first, then ibuprofen three hours later, then back to acetaminophen, and so on.
If your child falls asleep, let them sleep. There’s no need to wake them for a dose. But if they wake up uncomfortable, go ahead and treat them right away.
Keeping Your Child Hydrated
The mouth sores are often the worst part of HFM, and they can make children refuse to eat or drink. Dehydration is the most common complication, so liquids matter more than solid food during the acute phase. Cold drinks, popsicles, slushies, and milkshakes are ideal because the cold temperature numbs the sores and the calories provide energy.
Avoid anything acidic, salty, or spicy. Citrus juice, tomato-based foods, and chips will sting open sores and make your child less willing to eat or drink anything at all. For toddlers and older kids who will eat, stick with soft foods like yogurt, pasta, pudding, and smoothies. Keep in mind that plain water alone doesn’t provide the calories or salt a sick child needs if they’re not eating. Offering diluted juice, broth, or an oral rehydration solution alongside water helps maintain energy and blood pressure.
Caring for Skin Blisters
The rash on hands, feet, and sometimes the buttocks can itch and feel uncomfortable. Calamine lotion applied directly to blisters helps soothe irritation. If itching is significant, an over-the-counter antihistamine can provide relief. Do not pop the blisters. The fluid inside them contains the virus, and breaking them open increases the risk of bacterial skin infection.
A common mistake parents make is avoiding baths, but regular gentle bathing actually helps. Keeping the skin clean prevents secondary infection from bacteria entering open blisters. Lukewarm water with mild soap is sufficient. Pat the skin dry rather than rubbing.
Cleaning Your Home
The viruses that cause HFM lose most of their ability to infect within a few hours on dry surfaces like plastic, and can last up to about 7 hours on wood and stainless steel. Viral genetic material lingers much longer, but it’s the live virus that matters for transmission. Regular cleaning with soap and water is effective for most surfaces. For toys that can handle it, heat is the most reliable disinfectant: exposure to 140°F (60°C) for 15 minutes completely inactivates the virus. This makes a dishwasher or a hot water soak a practical option for hard toys and utensils.
Focus your cleaning on high-touch surfaces like doorknobs, light switches, and shared toys. Wash your hands thoroughly after diaper changes, since the virus sheds in stool for weeks after symptoms clear.
How Long HFM Stays Contagious
People with HFM are most contagious during the first week of illness. The virus spreads through saliva, nasal mucus, blister fluid, and stool. What catches many parents off guard is that the virus can continue spreading for days or even weeks after symptoms disappear. Some people spread it without ever showing symptoms at all.
The CDC’s guidance for returning to daycare or school is straightforward: no fever, feeling well enough to participate in class, and no uncontrolled drooling from mouth sores. Many daycares set their own policies, so check with yours, but fever-free and functional is the general standard. Children with widespread blisters that haven’t dried up should be kept home for at least 7 days to limit spread.
HFM in Adults
Adults can and do catch HFM, often from their own children. The symptoms can actually be more severe than in kids, and the pattern sometimes looks different. Adults may notice sores starting inside the mouth and around the lips before the rash appears on their hands and feet, which is the reverse of the typical childhood progression. The illness can also mimic other skin conditions, leading to confusion about the diagnosis. The same home care applies: pain relief, cold fluids, and time.
Some adults and children experience nail changes weeks after the illness resolves. Fingernails or toenails may peel or fall off. This looks alarming but is temporary, and the nails grow back normally.
Warning Signs That Need Medical Attention
Most HFM cases are mild, but a small number can develop serious complications. Contact your pediatrician right away if your child seems unusually listless and doesn’t perk up after a dose of pain medication. A stiff neck with fever can signal viral meningitis. Seek immediate care for a fever above 105°F, a fever lasting more than two to three days, or any fever above 100.3°F in a baby younger than 3 months.
Extremely rare but serious complications include brain swelling and paralysis. These are more associated with certain viral strains that circulate primarily in parts of Asia. In most cases in North America and Europe, HFM is an uncomfortable but self-limiting illness that clears on its own with supportive care at home.