A fistula is an abnormal connection between two body parts, such as an organ or blood vessel and another structure. Fistulas are usually the result of an injury or surgery. Infection or inflammation can also cause a fistula to form.

You probably could see that your lips were drying out and starting to crack. If you let them continue to dry out, they get larger and even begin to bleed. This is an example of a type of fissure that can occur in your body. A fissure is a crack or tear in the skin.

Piles are collections of tissue and vein that become inflamed and swollen. The size of piles can vary, and they are found inside or outside the anus. Piles occur due to chronic constipation, chronic diarrhea, lifting heavy weights, pregnancy, or straining when passing a stool.

Varicose veins are twisted, enlarged veins. Any superficial vein may become varicosed, but the veins most commonly affected are those in your legs. That's because standing and walking upright increases the pressure in the veins of your lower body.

A pilonidal sinus (PNS) is a small hole or tunnel in the skin. It may fill with fluid or pus, causing the formation of a cyst or abscess. It occurs in the cleft at the top of the buttocks. A pilonidal cyst usually contains hair, dirt, and debris. It can cause severe pain and can often become infected.