What causes small red spots on the glans penis?

Small red spots on the glans penis may be caused by various factors. Excessively long foreskin or improper hygiene may lead to bacterial growth and infection, manifesting as red spots on the glans, possibly accompanied by an unpleasant odor. Sexually transmitted infections (STIs), such as gonorrhea and syphilis, can also cause red spots on the glans, often accompanied by symptoms such as pain and difficulty urinating. Allergic reactions to substances such as condoms or lubricants may cause skin itching and swelling. Balanitis and genital warts are also common causes; the former is caused by poor local hygiene or decreased immunity, while the latter is caused by human papillomavirus (HPV) infection, which may initially present as light red papules. To address these possible causes, it is recommended to maintain local cleanliness and dryness, avoid irritants, and seek timely medical examination and treatment.