Heart attack — When it comes to major negative health consequences from sex, we typically hear about this one. Trouble finishing or reaching climax again — I know that some men will think that this belongs in the next section, but this is a perfectly normal reaction to having lots of sex in a short timeframe. Some infections, such as yeast infections or bacterial vaginosis, create irritation of the vulvar or vaginal tissue, leading to immediate pain with sex. The diagnosis of these conditions requires a thorough gynecologic exam, and, in a few cases, a small biopsy of the skin using local anesthesia in the office. If anything, regular, good sex boosts heart health. With many symptoms flu-like in nature, such as sore throat and fever, patients often are told that they have a minor viral infection and that they should return if their condition does not improve. Decreased Vision —- People have been known to pop blood vessels in the eyes during sexual activity. Strained muscle s — As with any other athletic, cardiovascular activity, you run the risk of pulling something. Contrary to popular belief, psychological causes are very unusual, and medical causes are usually the culprit. Probably the most common type of pain with intercourse is "deep thrust" dyspareunia, where deep penile penetration causes pain. To avoid a UTI, a woman should be sure to empty her bladder immediately before and after intercourse. Fracture — While men cannot "break" their member since there is no bone in it , they can suffer from a fracture. Just stay off of your back, knees or whatever is causing you discomfort and congratulate yourself for taking one for the team. Another source of this type of pain is an allergy to semen, which is actually quite uncommon. They may also notice bruising and experience excruciating pain. Pain immediately upon penetration or touching the outer lips of the vagina can be caused by a variety of medical problems. As with any condition with a potential psychological component, there is controversy about this disorder.