It is possible to get an infection from an unwounded penis. Many infectious diseases and even sexually transmitted diseases can be spread through sexual intercourse, and many pathogens are transmitted through bodily fluids. Common diseases that can be transmitted through sexual intercourse include vaginitis, AIDS, syphilis and warts. All have a chance of being infected if you have sex with a person in the infected stage. Even if there is no wound on the glans area, but if you don’t pay attention to hygiene and have no protection, you may still be infected, which will lead to redness, pain, frequent urination, painful urination and other symptoms. You must pay attention to intimate hygiene in daily life, especially local cleaning before sexual intercourse. Do not overindulge in sexual intercourse, change sexual partners frequently, avoid high-risk sex, and recommend the use of contraceptives when there is no plan to prepare for pregnancy.