White particles on the forehead are considered to be caused by acne, cornu rashes, sweat duct tumors and so on. 1. Acne: It is a kind of non-inflammatory papule formed after the blockage of sebaceous gland ducts of hair follicles, which often occurs on the face, chest, back and shoulders, etc. It can be manifested as a conical papule consistent with the mouth of hair follicles, with yellowish-white or dotted black tip. 2. Corns: are originated from the epidermis or appendage epithelial retention cysts, primary from the newborn period, by the undeveloped sebaceous glands or cuirasses funnel part of the lower end of the epithelium, the damage can be naturally subside; secondary occurs in the trauma, skin diseases, and after drug treatment. Happens in the face, typical lesions for yellow-white, solid papules. 3. Sweat duct tumor: it is a kind of adenoma differentiated from the ducts at the end of the sweat glands, mostly affecting young women, and it can be aggravated during puberty, and some patients have family history. Commonly found around the eyelids, forehead and cheeks, neck, etc., lesions are pale white yellow hemispherical or flat papules. There are many reasons for the appearance of white granules on the forehead, and it is recommended that patients go to the hospital for a clear diagnosis and treatment as prescribed by the doctor.