How many days will it take for hand, foot, and mouth disease to develop blisters?

Patient's question:

My child just turned two years old. I don't know whether it was infected with the virus or if the hygiene I usually practice is not adequate, so some blisters have repeatedly appeared in his mouth. The doctor said it's hand, foot, and mouth disease. How many days does it take for blisters to appear with hand, foot, and mouth disease?

Doctor's answer:

Once a child is infected with the herpes virus, blisters may repeatedly appear on the hands, mouth, feet, or buttocks within about seven or ten days, ranging in severity. The outbreak of blisters typically occurs around seven days, and it may be accompanied by some cold-like symptoms. Therefore, prompt action is necessary to prevent encephalitis. Children with fever should also drink more water, which can help reduce the temperature.

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