Seborrheic dermatitis

Seborrheic dermatitis, also known as seborrheic eczema, is a common chronic inflammatory skin disease that primarily affects seborrheic areas such as the scalp, face, chest, back, or perineum. It is characterized by erythematous rashes with greasy scales or crusts on the surface, often accompanied by varying degrees of itching. Seborrheic dermatitis on the scalp can cause dandruff.