<unk>  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.
Recurrent palmoplantar hidradenitis
Localized lichen myxedematosus
Palmoplantar keratoderma
Localized heat contact urticaria
Hand eczema
Chronic vesiculobullous hand eczema
Discrete papular lichen myxedematosus
Localized granuloma annulare