Oily dermatitis, clinically called seborrheic dermatitis, is a chronic inflammatory skin disease that occurs on the basis of seborrhea. Its etiology may be related to genetic, endocrine, infectious (e.g. fungal, etc.) immune, neurological and environmental factors. Seborrheic dermatitis occurs in areas where the sebaceous glands are abundant, such as the scalp, forehead, between the eyebrows, nose, chest and scapular area, and armpits. The rash often starts on the scalp. It is accompanied by varying degrees of itchiness. It is common in young people and infants. The course of the disease is chronic. Occurs on the scalp and may be accompanied by hair loss. The lesions are slightly yellowish, greasy, pale red patches, often well-defined, with greasy scales and/or crusts. If the lesions occur on the scalp, they are called crusty when they are accompanied by greasy adhesive yellow crusts or intermittent exudation on top of the inflammatory damage. The scaly type occurs when there are small flakes of chaffy scales or greasy scales with mild inflammation of the base. In the trunk, the lesions are round or oval or circular in shape. In the axillae and other folds, they may be accompanied by vesicles, similar to eczema, but with greasy scabs. The treatment of seborrheic dermatitis is based on general treatment, avoiding hot water soap and all kinds of mechanical stimulation, such as scratching. Restrict a high-fat, sugar-rich diet and avoid alcohol and spicy and other irritating foods. Eat a diet rich in vitamins such as fruits and vegetables. Keep your bowels open.