The appearance of the external mouth of the anal fistula is not exactly the same in different patients, most patients manifest as a small hole around the anus, there is secretion outflow repeatedly; when the external mouth pseudo-healing, can form a high out of the skin surface of the bulge, the color is relatively dark; the external mouth of the infection, can be manifested as a local redness and swelling.
1. small hole: the external mouth of the anal fistula is connected to the anus through the fistula tract, in most cases, it can be manifested as the presence of small holes in the perianal area, there can be repeated secretions, there is a foul odor, and the skin around the small holes is often accompanied by itching.
2. Small bumps: If the external opening forms a pseudo-healing, the external opening can form a small bump high up on the surface of the perianal skin, the color is darker than normal skin tissues, and there is occasional pressure and pain when touching.
3. Redness and swelling: If there is a bacterial infection at the external mouth of the anal fistula, it can show the symptoms of redness, swelling and heat pain, no breakage of the formation of red swellings, there is a breakthrough in the mouth, there will be pus outflow.
The specific situation is recommended to go to the hospital for examination, in order to clarify the condition, anal fistula conservative treatment is ineffective, more need to carry out surgical treatment.