Patients who have a small red bump inside the glans may be caused by glansitis, condyloma acuminatum, syphilis and other diseases. 1. glans: glans is the inflammation of the glans mucosa, mainly caused by the circumcision, pathogen infection, external stimulation, etc., the patient may appear glans local skin mucosa edema, erythema, ulcers, etc., glans inside a small red bumps may be caused by glans. 2. Condyloma acuminatum: Condyloma acuminatum is a sexually transmitted disease caused by human papillomavirus infection, when the patient suffers from condyloma acuminatum may lead to the glans to appear obvious small red pimples, with the gradual increase of red pimples, the localization will appear corns or cauliflower-like growths. 3. Syphilis: small red bumps inside the glans, may also be caused by syphilis, syphilis is caused by syphilis spirochete infection caused by a class of chronic sexually transmitted diseases, usually a syphilis patients have no obvious symptoms, with the aggravation of the condition of the two, three syphilis patients may appear syphilitic rashes, neurosyphilis, skeletal syphilis and other symptoms. It is recommended that patients seek medical examination in time to clarify the cause of the disease and then carry out targeted treatment, pay attention to personal hygiene in life, keep the glans area clean and hygienic, avoid unclean sex, and regular review.