Picture of Juvenile Plantar Dermatosis (Dermatitis)
Juvenile plantar dermatosis (dermatitis, also "sweaty sock syndrome") is a condition that causes painful cracks on the soles of the feet. It most often occurs in children between the ages of 3 and 14. Affected skin has a scaly, glazed, and shiny appearance.
Children with eczema, asthma, and hay fever seem to be especially prone to juvenile plantar dermatosis. A combination of friction, sweat, and then over drying, triggers the condition. Sometimes synthetic shoes like nylon or vinyl are partly to blame, as these prevent the feet from drying. Sandals can also cause problems, as they are apt to produce more friction than ordinary shoes.
Text Source: American Osteopathic College of Dermatology: "Juvenile Plantar Dermatosis"