The manifestations of seborrheic dermatitis on the face include infantile facial symptoms and adult facial symptoms, usually acne, erythema, greasy flaking, itching, vesicles, scarring and other symptoms. 1. Infantile facial symptoms: generally manifested as small red patches, covered with greasy scales, easy to form yellowish scabs, accompanied by mild itching, and in severe cases, there may be erosion, oozing and other symptoms. 2. Adult facial symptoms: often spread from the scalp, involving the arch of the eyebrows, eyelids, nasolabial folds, (male) beard area, etc., accompanied by acne; diffuse erythema and greasy flakes on the face; eyelid blepharitis may appear, and in severe cases, there are vesicles and scabs; eyebrow hairs and male beard thinning due to itching and scratching. It is recommended that if the above symptoms exist, patients need to go to the dermatology department of regular hospitals in a timely manner, follow the doctor’s instructions to clarify the diagnosis and active treatment.