Consequences of recurrent anal fistulas

Written by Yang Dong

Colorectal Surgery Department

Updated on September 03, 2024

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If an anal fistula is not treated in time, it may repeatedly occur. If an anal fistula repeatedly occurs, due to local inflammation, pus will spread and infiltrate into the perianal tissues, causing further aggravation of infection. This can then affect the function of the anus, potentially leading to symptoms such as fecal incontinence. Moreover, if an anal fistula repeatedly occurs over a long period, there is a possibility of malignant transformation.

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Written by Chen Tian Jing

Colorectal Surgery

1min 1sec

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Should surgery be performed if there are no symptoms of anal fistula?

If an anal fistula is in its acute phase, the main clinical symptoms are intermittent discharge of pus from the external opening, or pain and itching. If there are no symptoms, and only the external and internal openings along with the fistula tract exist, surgery is still required because the absence of symptoms temporarily does not guarantee that an acute episode will not occur later. During an acute episode, there will be local tissue and skin inflammation, redness, heat, and severe pain. If an anal fistula is not surgically treated for a long time, it may lead to an increase in the number of branches of the fistula or thickening of the fistula wall, and it may even spread to the pelvic cavity. Therefore, once an anal fistula is discovered, it is necessary to perform surgery as soon as possible. Early treatment has significant benefits for wound recovery and the difficulty of the operation.

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Written by Yu Xu Chao

Colorectal Surgery

1min 6sec

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What are the precautions after undergoing anal fistula surgery?

Because anal fistula surgery primarily involves removing the internal opening and the fistula tract, the postoperative wound is relatively large. Postoperative care mainly requires consistent dressing changes to ensure the wound drainage remains unobstructed, avoiding infection or false healing. Additionally, patients should develop good bowel habits, maintain smooth bowel movements, and avoid withholding stool. Otherwise, this may lead to dry, hard stools, causing severe pain during defecation or damaging the wound, which could result in bleeding or edema. In terms of diet, patients should choose foods rich in roughage to ensure smooth defecation and eat foods rich in high-quality protein to supplement the amino acids the body needs, promoting wound healing as much as possible. Moreover, after surgery, patients must use an anal wash or potassium permanganate solution for sitz baths. Since the postoperative wound is open and contaminated, changing dressings is especially important.

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Written by Chen Tian Jing

Colorectal Surgery

52sec

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Can an anal fistula be left untreated for a lifetime?

If diagnosed with an anal fistula, one should not forego treatment indefinitely, as an anal fistula is a localized infectious disease of the anal region. Without active treatment, the infection may further spread, increase the number of fistula branches, and potentially induce a high, complex anal fistula. There is also a risk that the fistula and the infection might penetrate the local anal sphincter, reaching the ischioanal fossa and causing other infectious diseases. The primary treatment method for anal fistulas is surgical, mainly involving fistulotomy with seton placement, which thoroughly removes the local infection, allowing the anal fistula to heal. Neglecting active treatment could worsen the condition or increase the difficulty of future surgeries.

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Written by Chen Tian Jing

Colorectal Surgery

1min 6sec

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How long does it take to recover after surgery for an anal fistula?

Healing after surgery for an anal fistula requires some time, and the longer healing duration is mainly related to two factors: The first reason is that anal fistula is a localized infectious disease of the anus with the presence of a fistula. The principle of surgery is primarily to remove the fistula. Therefore, after the surgery, the wound surface from the removed fistula wall is relatively large and requires time to heal. The second reason is that the local area around the anus is a contaminated wound, with feces passing through daily. Feces are a significant source of contamination, so the wound healing is influenced by the irritation from feces, resulting in a non-sterile wound environment. Consequently, the wound healing rate after the surgery is slower compared to the healing rate of sterile wounds in other body tissues. Therefore, the recovery time after anal fistula surgery is approximately 3 to 4 weeks.

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Written by Chen Tian Jing

Colorectal Surgery

1min 10sec

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What causes anal fistulas?

The most common cause of anal fistula is perianal abscess. Both anal fistula and perianal abscess involve infections at the anal crypts. Typically, an anal fistula forms naturally after a perianal abscess ruptures. Once an anal fistula occurs, it requires prompt surgical treatment. The primary surgical technique is fistulotomy with seton placement, thoroughly removing the local lesion and infection focus to allow fresh granulation tissue to regrow. Anal fistula is a local infectious disease of the anus, generally categorized into simple superficial anal fistula and high-risk complex anal fistula. If a high-position complex anal fistula is suspected, further diagnosis may require additional examination with pelvic MRI or perianal ultrasonography. After the rupture of a perianal abscess, it typically forms a characteristic internal and external opening, with a fistula tract connecting them, thereby forming the typical anal fistula.