Dense small white dots on the lips, many are symptoms of lipitis, herpes simplex or sebaceous ectasia, need to go to the hospital dermatology department for a clear diagnosis. 1. Lipitis is currently of unknown etiology, mainly related to the use of poor quality lipstick, lipstick, and body immune function disorders are also related. The main manifestation is the appearance of scattered white spots on the lips, peeling, accompanied by obvious itching or burning sensation. 2. Herpes simplex is caused by a viral infection, and many people are infected by using lipstick and masks used by people with herpes simplex. The main manifestation is the appearance of dense white blisters on the edge of the lips, blisters pinpoint size, densely arranged, but there is obvious itching or burning sensation. 3. Sebaceous ectasia is of unknown etiology, mainly related to genetics and local friction. The manifestation of the upper lip appeared in a dense pinpoint-sized white spots, white spots slightly protruding from the skin, usually without any uncomfortable symptoms. Sebaceous ectasia usually does not require treatment, but can be treated with carbon dioxide laser or cryotherapy if aesthetics require it, but there is a risk of recurrence after treatment. There may be other reasons for the dense white dots on the lips, it is recommended to go to the hospital in time to find out the cause, and follow the doctor’s instructions for symptomatic treatment.