Which sexually transmitted infections cause bumps on the body?

Sexually transmitted infections (STIs) are diseases primarily spread through sexual contact. Common STIs include gonorrhea and syphilis. These infections typically occur following unprotected or unsafe sexual activity and usually have an incubation period.

Which STIs cause skin bumps or lesions?

Indeed, certain STIs—such as genital warts (caused by human papillomavirus, HPV)—can present with visible bumps or growths. However, skin bumps may also arise from non-STI conditions, such as urticaria (hives). Among STIs, common causes of skin lesions include HIV/AIDS, non-gonococcal urethritis, genital herpes, genital warts, and chancroid. In contrast, urticaria is an allergic skin disorder resulting from immune system dysregulation. Treatment for urticaria focuses primarily on antiallergic therapy and relief of itching and wind-induced symptoms. Recommended oral medications include azathioprine hydrochloride tablets and compound glycyrrhizin capsules. Topical treatment may include compound rehabilitation cream. In severe cases, intravenous infusion may be added to significantly improve rash symptoms. Avoid scalding the affected area with hot water and never scratch the lesions, as this may cause skin injury and worsen infection.

The most effective way to prevent STIs is to avoid unsafe or high-risk sexual behaviors—including heterosexual, homosexual, or other forms of unprotected sexual contact. Unprotected intercourse without condom use significantly increases the risk of transmitting infectious diseases and should therefore be avoided whenever possible.

Additionally, some STIs—such as gonorrhea and genital warts—can occasionally be transmitted indirectly via contaminated personal items (e.g., towels, underwear, or bathing utensils). Thus, if a family member has an STI, their personal belongings should be used separately and thoroughly disinfected to prevent cross-infection. We hope this information is helpful to you!