Anus

Why Does Fistula Cause Swelling Near the Anus?

Anus swelling can be uncomfortable, especially when it is accompanied by pain, redness, irritation, or discharge. One possible reason is an anal fistula, a small abnormal passage that develops between the inside of the anus or rectum and the skin around it. In many cases, an anal fistula develops after an infection or abscess near

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