Hand, Foot, and Mouth disease
https://www.cdc.gov/hand-foot-mouth/about/index.html
Hand, foot, and mouth disease (HFMD) is common in children under 5 years old, but anyone can get it.
The illness is usually not serious, but it is very contagious.
To prevent spreading HFMD, wash your hands often, clean and disinfect surfaces, and avoid close contact with others.
What it is
HFMD is a common illness that usually causes fever, mouth sores, and skin rash. It can spread quickly at schools and day care centers. Most people get better on their own in 7 to 10 days.
Signs and symptoms
Most children have mild symptoms for 7 to 10 days. Symptoms may include:
Fever
Sore throat
Painful mouth sores that blister
Rash commonly found on the hands and feet
Complications from HFMD are rare.