An anal fistula is a small tunnel that connects the inside of the anus to the skin around it. It often starts when a gland near the top of the anal canal gets infected. This infection can lead to an abscess (a painful, swollen area filled with pus) around the anus. When the abscess drains, it can create a passageway or “tunnel" (fistula) from the infected gland to the skin's surface. Treatment for an anal fistula usually involves surgery. One common procedure is called a fistulotomy, which opens up the fistula to allow it to heal properly. For the best treatment of anal fistula, consider visiting Manipal Hospital, where experienced specialists provide advanced care for this condition. .