Recurrent palmoplantar hidradenitis (also known as "Idiopathic palmoplantar hidradenitis," "Idiopathic plantar hidradenitis", "Painful plantar erythema," "Palmoplantar eccrine hidradenitis", "Plantar panniculitis") is primarily a disorder of healthy children and young adults, characterized by lesions that are primarily painful, subcutaneous nodules on the plantar surface, resembling erythema nodosum

Erythema nodosum

Erythema nodosum is an inflammation of the fat cells under the skin characterized by tender red nodules or lumps that are usually seen on both shins...

.