Hand, foot and mouth disease (HFMD) usually lasts about 7–10 days from the time symptoms start, with most people recovering fully in that window.

How long it usually lasts

  • The typical illness course is about 7–10 days from the first fever or sore throat until the rash and mouth sores settle.
  • Many pediatric and infectious‑disease sources describe it as a short, mild viral illness where most children recover within 10 days without complications.
  • Adults can get HFMD too; the timeline is usually similar, though symptoms may be milder or sometimes feel worse in the throat.

Symptom timeline in simple terms

Think of HFMD in three rough phases (exact timing varies by person):

  1. Early phase (days 1–3)
    • Fever, sore throat, reduced appetite, kids may be cranky and tired.
    • You may not yet see the classic spots on hands, feet, or in the mouth.
  2. Peak phase (days 3–7)
    • Painful mouth ulcers and the hand/foot rash are most obvious.
    • Fever usually settles by day 3–4, but eating and drinking can still hurt because of mouth sores.
    • Blisters often start to dry up toward the end of this period.
  3. Recovery phase (days 7–10+)
    • Rash and sores crust over and fade, and energy gradually returns to normal.
    • Nails can sometimes peel or shed a few weeks later in kids; this looks scary but usually heals without long‑term problems.

How long it’s contagious

  • HFMD is most contagious in the first few days of illness, often just as the fever starts and before the rash is fully obvious.
  • The blisters generally dry up in about 10 days , and people are much less likely to spread it once there’s no wet blister fluid.
  • The virus can still be shed in stool for several weeks after symptoms clear, which is why careful hand‑washing and hygiene matter even after a child “seems fine.”

When to worry about how long it’s lasting

You should contact a doctor or urgent care promptly if:

  • Symptoms are not improving at all after 7–10 days , or they’re getting worse instead of better.
  • Your child (or you) has trouble drinking, peeing very little, or shows signs of dehydration (dry mouth, no tears when crying, very low energy).
  • There is stiff neck, confusion, breathing trouble, chest pain , or very high persistent fever.
  • A baby, immunocompromised person, or pregnant person is affected and you’re unsure what’s safe.

Quick practical tips while it runs its course

  • Offer cool drinks and soft foods (yogurt, smoothies, soups that aren’t too hot) to ease mouth pain.
  • Use age‑appropriate pain/fever medicine (paracetamol/acetaminophen, ibuprofen) as advised by a healthcare professional.
  • Keep the person home from daycare/school/work while there is fever and lots of fresh blisters, and return once they feel well, are fever‑free for at least 24 hours, and blisters are mostly dry.
  • Wash hands often, clean shared surfaces, and avoid sharing cups/utensils during and shortly after the illness.

If you tell me whether this is for a child or an adult, and what day of illness you think you’re on, I can help you estimate where you probably are in the 7–10 day timeline and what to watch for next.