A lot of small red dots on the glans may be related to contact dermatitis, eczema, pubic lice and other reasons. 1. Contact dermatitis: It may be caused by the stimulation of external substances such as condoms and poor quality underwear, or allergic reaction to the rash. 2. Eczema: it may be that the perineal area is moist, coupled with the underwear is not breathable, resulting in high temperature, easily induced eczema, the appearance of small red spots on the skin of the glans. 3. Pubic lice: belong to a kind of parasites in the pubic hair area, can spread to the surrounding skin, and has a certain degree of contagious. It will bite the skin repeatedly, and the mouthpiece causes mechanical damage as well as secretion of toxins, so there will be red spots. When the glans grows a lot of small red dots, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for further examination, with the help of the doctor to clarify the cause, and targeted treatment or treatment.