Seborrheic dermatitis, also known as seborrheic eczema, is a chronic papular and scaly superficial inflammatory skin disease that occurs in areas where sebum is secreted, and it can be accompanied by itching of varying degrees. The causes of the disease are generally believed to be related to increased sebum secretion or changes in the chemical composition of the sebum. It is also associated with colonization and infection by Malassezia yeast. Factors such as stress, diet, deficiency of B vitamins, and alcohol consumption can also affect the onset and progression of the disease to varying degrees. When seborrheic dermatitis occurs on the face, its symptoms primarily manifest as initial follicular papules that gradually merge and expand into dark red or yellowish-red patches. These patches have oily or dry scales and in severe cases may exhibit exudation, crusting, erosion, presenting eczema-like changes.