Hand, foot, and mouth disease is a contagious disease caused by viral infection, which is common in infants and toddlers, especially those under the age of three. The main symptoms include fever, accompanied by maculopapular rashes or vesicles on the hands, feet, mouth, and buttocks. Some initial symptoms are similar to having a cough, runny nose, headache, mouth pain, or sore throat. Sometimes there may be drooling; consequently, babies might drink less milk, and there can be nausea and vomiting. Additionally, some children may experience nausea and diarrhea along with other gastrointestinal symptoms. Another major sign is the presence of vesicles in the hands, feet, and mouth, or maculopapular rashes on the buttocks.