Hand, foot, and mouth disease (HFMD) typically resolves in 5 to 7 days. Most children and adults feel noticeably better within a week, though some lingering effects like skin peeling or nail changes can stretch the full timeline to several weeks or even months. Here’s what to expect at each stage.
From Exposure to First Symptoms
After contact with the virus, symptoms usually appear 3 to 6 days later. This incubation period often starts quietly. Your child might seem slightly off, a little fussy or tired, before anything visible shows up. The first noticeable sign is typically a fever, followed within a day or two by painful sores inside the mouth and a rash on the hands, feet, and sometimes the buttocks or legs.
What Each Symptom Looks Like Day by Day
The illness tends to follow a predictable pattern. Days 1 through 2 bring fever, sore throat, and general discomfort. The fever is usually mild, but one strain of the virus (enterovirus 71) is more likely to cause temperatures above 102°F that last longer than three days. By days 2 through 3, small red spots appear in the mouth, quickly turning into painful ulcers that make eating and drinking miserable. A rash of flat red spots or small blisters shows up on the palms, soles, and sometimes between the fingers and toes.
By days 4 through 5, the fever has usually broken and the worst of the throat pain is fading. The skin blisters begin to dry out on their own. By day 7, most people feel back to normal. The blisters crust over without scarring, and energy levels return. Let blisters dry naturally rather than popping or covering them.
Why Mouth Sores Cause the Most Trouble
The skin rash gets the most attention, but the mouth sores are what make kids miserable. They hurt enough to cause drooling in younger children and outright refusal to eat or drink in toddlers. Dehydration is the most common complication of HFMD, not because the virus itself is dangerous, but because a child with a mouth full of ulcers simply stops drinking. Cold foods like popsicles, ice chips, and chilled water are easier to tolerate than anything warm, acidic, or salty. The mouth sores generally heal within 5 to 7 days without any treatment.
How Long You’re Contagious
HFMD is most contagious during the first week of illness, especially in the first few days when the fever is highest and blisters still contain fluid. Once blisters have crusted over and there’s no fluid inside, the skin is no longer infectious. But the virus doesn’t leave your body that quickly.
Respiratory shedding (through coughs, sneezes, and saliva) typically lasts 1 to 3 weeks. The virus can persist in stool for weeks to months after the infection begins, which is why thorough handwashing after diaper changes matters long after your child looks healthy. This extended shedding is also why outbreaks in daycares are so hard to contain.
When Kids Can Go Back to Daycare or School
The CDC considers HFMD mild enough that children can return to group settings as long as they meet three conditions: no fever, feeling well enough to participate normally, and no uncontrolled drooling from mouth sores. Some local health departments have stricter rules during outbreaks and may require children to stay home longer, so it’s worth checking with your child’s school or daycare about their specific policy. In practice, most kids are ready to go back within 5 to 7 days.
Skin Peeling and Nail Changes After Recovery
Even after your child feels fine, you might notice the skin on their fingers, toes, palms, or soles starts to peel. This is normal and harmless. It usually begins a week or two after the rash clears and resolves on its own.
A more alarming but equally harmless effect is nail shedding, known medically as onychomadesis. Fingernails or toenails may start to separate from the nail bed and partially or fully fall off, typically 3 to 6 weeks after the initial infection. It looks dramatic, but the nails grow back completely without any treatment. Since nails grow about 2 to 3 millimeters per month, full regrowth can take 6 to 18 months depending on which nails are affected. Toenails take longer than fingernails.
HFMD in Adults
Adults can and do catch HFMD, and the timeline is roughly the same: 5 to 7 days of active illness. Adults sometimes report more intense pain from the blisters on their hands and feet, which can make walking or gripping things uncomfortable. The mouth sores can be just as painful as they are in children. Adults who catch it from their kids often describe it as surprisingly miserable for something considered a mild childhood illness.
When Recovery Takes Longer Than Expected
Most cases resolve without incident, but the enterovirus 71 strain is associated with higher fevers, longer duration, and a greater risk of complications compared to the more common coxsackievirus A16 strain. A fever lasting more than three days, a child who seems increasingly lethargic rather than improving, or signs of dehydration (no wet diapers for several hours, no tears when crying, sunken soft spot in infants) all warrant prompt medical attention. Severe complications are rare, but they tend to develop quickly when they do occur.