A burn is damage to your body's tissues caused by heat, chemicals, electricity, sunlight, or radiation. Scalds from hot liquids and steam, building fires and flammable liquids and gases are the most common causes of burns. Another kind is an inhalation injury, caused by breathing smoke.
There are three types of burns:
Burns can cause swelling, blistering, scarring and, in serious cases, shock, and even death. They also can lead to infections because they damage your skin's protective barrier. Treatment for burns depends on the cause of the burn, how deep it is, and how much of the body it covers. Antibiotic creams can prevent or treat infections. For more serious burns, treatment may be needed to clean the wound, replace the skin, and make sure the patient has enough fluids and nutrition.
NIH: National Institute of General Medical Sciences
Painful urination after intercourse is a sign of urinary tract infection (UTI). It could be due to bacterial infection. To prevent a UTI, you may try to urinate before and after intercourse to remove the bacteria attached to the urinary tract. If painful urination continues, contact your doctor to know for sure what is going on. If you frequently have a UTI, you may also want to contact your doctor for a prescription of antibiotics to take after intercourse. References 1. Urinary tract infections. Womenshealth.gov. URL: https://www.womenshealth.gov/a-z-topics/urinary-tract-infections. Accessed May 19, 2018.