Hand, foot and mouth disease is one of those childhood illnesses that parents often encounter for the first time when their child comes home from nursery with it, and feel underprepared for — partly because the name sounds more alarming than the reality, and partly because the mouth sores can cause significant distress and feeding difficulty in young children. It is a common, self-limiting viral illness that requires no specific treatment and causes no lasting harm in the vast majority of cases.
Understanding what HFMD is, what it looks like, how to manage the most difficult aspects (particularly the mouth soreness that affects eating and drinking), and when it might warrant medical assessment helps parents navigate it with confidence.
Healthbooq provides parents with evidence-based guidance on common childhood illnesses, including practical management guidance for the most troublesome symptoms.
What HFMD Is and What It Looks Like
Hand, foot and mouth disease is caused by coxsackievirus (most commonly coxsackievirus A16) and other enteroviruses. It is a different illness from foot-and-mouth disease in animals (which cannot be transmitted to humans). It is most common in children under five and spreads easily through the faecal-oral route and through respiratory droplets.
The illness typically begins with a fever and general unwellness for one to two days, followed by the development of sores or ulcers in the mouth (on the tongue, inner cheeks, and gums) and a rash of small, blister-like spots on the palms of the hands, soles of the feet, and sometimes the buttocks and legs. The spots may be flat or slightly raised and are usually not particularly itchy. In some children, the nail changes (nails may loosen or fall off) can occur weeks after the illness — this is benign and the nails regrow normally.
Why Fluid Intake Is the Priority
The mouth ulcers of HFMD can be significantly painful and can make eating and, more importantly, drinking quite difficult. Dehydration is the primary complication to watch for, particularly in younger babies who cannot explain why they are refusing to drink. Signs of dehydration include: fewer wet nappies than usual; dry mouth and lips; crying without tears; and unusual lethargy.
Paracetamol and/or ibuprofen are the most effective management for mouth pain — they should be given regularly during the acute phase to keep pain controlled enough for the child to drink. Cold drinks and cold foods (ice lollies, cold water, cold milk) are soothing and often better tolerated than warm foods and drinks. Acidic or spicy foods should be avoided as they sting.
Ice lollies made from water or diluted juice are a practical way to combine pain soothing, hydration, and something the child will accept when refusing other foods and drinks.
Contagion and Return to Nursery
HFMD is contagious throughout the illness and for a period after. The UKHSA (UK Health Security Agency) guidance is that children do not need to be excluded from nursery or school once they are well enough to attend — the exclusion period is not defined by the rash resolving but by the child feeling well enough. Children who are unwell with fever, are unable to manage the nursery day, or are too uncomfortable should stay home; otherwise, return when well enough is appropriate.
When to Seek Medical Attention
Most children with HFMD do not need medical attention. Seek advice if: the child is showing signs of dehydration and is not managing adequate fluids despite management as described; the child is unusually drowsy or difficult to rouse; there is a very high or prolonged fever; or the parent is concerned. Rarely, certain strains (particularly enterovirus 71, more common in outbreaks in Asia than in the UK) can cause neurological complications — this is very uncommon in the UK but warrants medical attention if the child shows unusual neurological signs.
Key Takeaways
Hand, foot and mouth disease (HFMD) is a common viral illness in young children caused by coxsackievirus and other enteroviruses. It is characterised by a distinctive rash of blister-like spots on the hands, feet, and sometimes buttocks, alongside ulcers or sores in the mouth. The illness is self-limiting, typically resolving within seven to ten days, and requires only supportive management. Mouth sores can make eating and drinking painful, making adequate fluid intake the primary management concern. HFMD is contagious but not a notifiable disease; children can return to nursery or school once they feel well enough, regardless of whether the rash has fully resolved.
