A very small red spot on the glans may be caused by purpura, allergy, infection, external stimulation and so on. 1. Purpura: for example, allergic purpura, which can cause subcutaneous capillary rupture, causing bleeding spots on the skin and mucous membranes, may lead to very small red dots on the glans. 2. Allergy: Allergic reactions caused by food, drugs, shower gel, soap, underwear, etc., can also lead to the glans with very small red spots. 3. Infection: bacterial, viral, fungal and other pathogenic bacteria infection, caused by glansitis, can also cause glans with small red spots. 4. external stimulation: the glans is subjected to external pressure, bruises, or excessive masturbation, frequent sex, can cause subcutaneous capillary rupture, may also lead to the glans has a very small red dot. The glans has a very small red dot, there may be other reasons, it is recommended to go to the hospital in time to check, follow the doctor’s instructions for treatment.