A fairly common disease that spreads mainly in children's groups and is seasonal in nature. It is caused by the Coxackie virus and is spread by droplet infection. The incubation period is 3-5 days. It is manifested by sore throat accompanied by difficulty in taking solid food, temperatures, but also abdominal pain, diarrhea, vomiting. Painful canker sores occur in the oral cavity. On the skin, especially on the palms and soles, but recently also in the diaper area, knees and elbows and around the oral cavity, it manifests itself as numerous flat blisters, which gradually dry up and excrete. They do not leave scars. In the last period, after overcoming the disease, changes occur on the nails, most often in the form of separation of almost the entire nail plate.