A red glans with dots can be caused by condyloma acuminatum, allergic reaction and glans phimosis. 1. Condyloma acuminatum: mainly caused by human papillomavirus infection, patients usually have skin lesions and pimples and other symptoms, so it may be manifested as a red glans with small dots. 2. Allergic reaction: If the patient’s glans comes into contact with allergens, an allergic reaction may occur, which leads to the symptoms of red glans with dots. 3. Circumcision and glansitis: when the patient has a long foreskin, it is difficult to clean the inside of the foreskin completely, which can easily induce the occurrence of circumcision and glansitis, which leads to the phenomenon of red glans with dots. To summarize, there are many reasons for the red glans with small dots, so it is recommended to go to the hospital in time to clarify the cause of the disease and treat it.