Hand, Foot and Mouth Disease: How Long After Exposure?

Exposure does not always lead to illness, and the day of contact may be difficult to identify because the virus can spread before obvious signs appear. Watch for fever, tiredness, sore throat, reduced appetite, mouth ulcers, and small spots or blisters on the hands, feet, or other areas.

The first symptoms may resemble another viral infection. A later combination of mouth sores and a characteristic rash makes hand, foot and mouth disease more recognisable, although only a clinician can advise when the pattern is uncertain.

Keep up careful handwashing, especially after toileting, nappy changes, and wiping a child's nose or mouth. Do not share cups, utensils, towels, or toothbrushes, and clean commonly touched toys and surfaces. Check the exposed child each day for changes in temperature, drinking, energy, and skin or mouth symptoms.

If symptoms appear, offer regular fluids and soft foods, keep the child comfortable, and follow nursery or school guidance about staying home. Record when the first sign was noticed.

Contact a clinician if symptoms develop in a baby, if mouth pain makes drinking difficult, or if you are unsure whether the rash is infectious. Seek urgent care for marked drowsiness, breathing difficulty, repeated vomiting, very little urine, a seizure, or a child who looks seriously unwell.

Ask whether the timing and symptoms fit hand, foot and mouth disease, how long to avoid group activities, what household precautions are needed, and which warning signs require urgent review.