Hand, foot and mouth disease in adults

What it is

Hand, foot and mouth disease (HFMD) is caused by enteroviruses, commonly coxsackieviruses. It is best known as a childhood illness, but adults can become infected—especially parents, childcare workers, teachers, healthcare workers and people living in close quarters.

Some adults have no symptoms and can still spread the virus. Others develop fever, fatigue, throat pain and a distinctive eruption. Coxsackievirus A6 can cause a more extensive rash involving the arms, legs, face, trunk or areas of eczema, so adult HFMD does not always match a textbook picture.

What it looks and feels like

• Early phase: fever, reduced appetite, sore throat, headache or feeling generally unwell.
• Mouth sores: painful red spots or blisters on the tongue, gums, inner cheeks or throat.
• Hand and foot rash: flat or slightly raised spots, sometimes blistered, on palms, fingers, soles and toes.
• Atypical adult rash: lesions may extend to arms, legs, buttocks, face, trunk or around the mouth.
• Later changes: peeling skin or temporary nail shedding can occur weeks after some infections.

Causes, triggers and risk factors

• Close contact with saliva, nasal secretions, blister fluid or stool from an infected person.
• Touching contaminated toys, phones, door handles, cups or other shared surfaces.
• Household or workplace exposure to young children, especially in summer and early autumn.
• Crowded living, training or childcare environments where hand hygiene is difficult.

Treatment and self-care

There is no routine antiviral treatment for HFMD. Rest, fluids and pain relief are the priorities. Cool drinks, soft foods and salt-water mouth rinses may be easier on mouth sores. Avoid acidic, spicy or very hot food. Ask a pharmacist about suitable pain relief and follow label instructions.

Wash hands with soap and water, disinfect frequently touched surfaces, avoid sharing cups or towels and cover coughs. Do not intentionally open blisters. Adults should follow local workplace guidance; people handling food, providing healthcare or working with vulnerable individuals may need specific advice.

Conditions that can look similar

• Chickenpox: usually starts on the trunk and appears in crops at different stages.
• Herpes simplex: grouped painful blisters, often localized around the mouth or genitals.
• Erythema multiforme: target-shaped lesions, sometimes triggered by infection or medication.
• Drug eruption: a widespread rash after starting a medicine needs clinical assessment.
• Scabies: intense night-time itch with burrows, often between fingers and at wrists.

Day-by-day timeline in adults

Days 1–2: fever, sore throat, fatigue and reduced appetite may come first. Days 2–4: mouth sores and hand/foot lesions become more obvious. Days 4–7: fever usually settles while spots may blister or become tender. Days 7–10: lesions dry and general symptoms improve. Peeling or nail changes, if they occur, are later effects rather than a sign that the infection is returning.

People are often most contagious during the first week, but the virus can remain in stool for weeks. Careful handwashing after using the toilet and before preparing food remains important after the visible rash clears.

When to see a healthcare professional

• You cannot drink enough because mouth pain is severe or you have signs of dehydration.
• Fever is high, persistent, returns after improving or is accompanied by severe headache or stiff neck.
• The rash is extremely painful, rapidly worsening, infected-looking or involves the eyes.
• You are pregnant, immunocompromised or unsure whether a new medication caused the eruption.
• Symptoms are not clearly improving after 7–10 days.

Sources and further reading

We use established public-health and dermatology references and link them directly so you can verify the guidance and read further.

• HFMD signs and symptoms — CDC
• Atypical HFMD presentations — CDC MMWR

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