Hand, Foot & Mouth Disease Symptoms and causes and prevention Symptoms of hand, foot and mouth disorders generally include fever, mouth pain, and skin rashes. Hand diseases, foot and mouth disease are common in babies and children under the age of five. Most children have mild symptoms for 7-10 days. The symptoms are Fever and flu-like symptoms Children often develop a fever and other flu-like symptoms three to six days after the virus appears. Symptoms may include: fever Eat or drink less Irritated neck Don't feel good Other symptoms may appear in the next few days. Sores in the mouth A day or two after the fever starts, your child may have a sore mouth (herpangina). These sores usually start with small red spots, often on the back of the mouth, which can blister and become painful. Signs that swallowing can be painful for your child: Do...