Hand, Foot, and Mouth Disease is a contagious illness caused by enteroviruses, commonly occurring in children under the age of 5. Symptoms include oral pain, loss of appetite, low fever, and the appearance of small blisters or ulcers on the hands, feet, and mouth. Rashes may appear on the first or second day of illness, starting as pink spots or macules and evolving into vesicles before drying and crusting. Additionally, scattered blisters or ulcers may appear inside the mouth, causing pain during eating and refusal to eat.