If the patient’s wound in the anal area always fails to heal, the following reasons are mainly considered: first, the patient may have an infection with Mycobacterium tuberculosis, which forms an abscess called a cold abscess, and this abscess heals slowly without anti-tuberculosis treatment, and the wound often does not heal for several months. Secondly, bacterial infection is considered when the bacterial infection is more serious, there will be constant pus production and wound healing is slow. The third aspect to consider is the liquefaction of fat, a phenomenon that often occurs in patients with fatty bodies, where the wound is more difficult to close with more fat and therefore heals more slowly. The fourth aspect to consider is that the wound size is larger and deeper wounds are slower to recover. The fifth aspect is that the anal fistula is not completely removed from the fistula infection factor.