How to operate on a perianal abscess

Written by Chen Tian Jing

Colorectal Surgery

Updated on March 03, 2025

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The surgical methods for perianal abscess vary depending on the location of the lesion. If it is a simple ischiorectal fossa subcutaneous abscess, a one-time incision and drainage surgery is generally used. The local wound is debrided and necrotic tissue is removed. After trimming the wound, it is important to maintain clear drainage of the local wound. Local application of gauze strips for compression and drainage treatment can be used. If the abscess is in the ischioanal fossa or the pelvirectal space, considering that the location of the lesion is deep, a one-time incision and seton drainage radical surgery may be required for the perianal abscess. Post-surgery, thorough disinfection and drainage of the local wound are also necessary.

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Written by Chen Tian Jing

Colorectal Surgery

48sec

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Can an anal abscess be cured by taking medicine?

An anal abscess is formed due to repeated infections within the anal crypts, resulting in localized pus or an encapsulated abscess. During an episode, the patient experiences severe pain, strong positive tenderness, and notable swelling, heat, and pain around the anal area. In severe cases, it can affect normal sitting and even walking activities. When an anal abscess occurs, it generally requires prompt surgical incision and drainage followed by definitive surgery. Relying solely on oral or topical medications cannot completely cure an anal abscess and only serves to alleviate symptoms. Post-surgery for an anal abscess usually involves local dressing changes to prevent pseudohealing and maintain proper drainage of the wound.

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Written by Chen Tian Jing

Colorectal Surgery

49sec

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Which is more serious, perianal abscess or hemorrhoids?

Perianal abscesses and hemorrhoids are two different types of anorectal diseases. During the acute phase of a perianal abscess, the urgency of the condition is greater than that of hemorrhoids. If active surgical intervention and incisional drainage and debridement are not carried out for a perianal abscess, it can lead to further enlargement of the pus cavity, increasing the size of the infected wound and the focus of infection, causing more severe pain and symptoms of systemic infection in the patient. Hemorrhoids, on the other hand, can be managed with conservative medication to alleviate symptoms. Surgical treatment is considered only when there are recurrent flare-ups, severe pain, significant prolapse, and worsening bleeding.

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Written by Yu Xu Chao

Colorectal Surgery

1min 4sec

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Has the perianal abscess that was drained a month ago and is neither painful nor itchy healed?

This situation often shows good post-operative recovery. Whether this situation is completely resolved depends on whether anal fistulas develop later, as most perianal abscesses drained can easily form anal fistulas. This is because drainage of perianal abscesses merely removes pus and secretions as much as possible, but does not completely clear the internal opening of the abscess and infected tissues. Thus, anal fistulas are likely to form later, and the patient needs to continue monitoring. Moreover, it’s important to maintain a light diet, avoiding spicy, irritating, and dry-hot foods as much as possible while also keeping bowel movements smooth. Frequent constipation or diarrhea should be avoided as they can cause wound pain or lead to inflammation and infection of the anal glands, potentially causing recurrence of the perianal abscess or the formation of anal fistulas later. However, the current situation indicates a relatively good post-operative recovery.

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Written by Yu Xu Chao

Colorectal Surgery

1min 6sec

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Can an anal abscess without pus be treated without surgery?

Perianal abscesses require surgical treatment even if there is no pus present, as early-stage perianal abscesses are primarily characterized by pain and noticeable lumps near the anus, with the lumps typically being hard. This condition is mainly considered to be an infection and inflammation of the anal glands, which then infects the surrounding tissue, leading to the development of lumps. Surgical treatment should be undertaken as soon as possible even in the absence of pus, because as the infection worsens over time, it may lead to the formation of pus. Early treatment can be advantageous as the infected area is not very extensive, thus resulting in a smaller surgical wound. For early-stage perianal abscesses, a one-time radical surgery may be chosen to remove the internal opening and the infected tissue thoroughly, followed by postoperative care using medicated substances such as erythromycin ointment gauze, anal washes, or mupirocin ointment to promote healing of the surgical wound.

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Written by Chen Tian Jing

Colorectal Surgery

53sec

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How to operate on a perianal abscess

The surgical methods for perianal abscess vary depending on the location of the lesion. If it is a simple ischiorectal fossa subcutaneous abscess, a one-time incision and drainage surgery is generally used. The local wound is debrided and necrotic tissue is removed. After trimming the wound, it is important to maintain clear drainage of the local wound. Local application of gauze strips for compression and drainage treatment can be used. If the abscess is in the ischioanal fossa or the pelvirectal space, considering that the location of the lesion is deep, a one-time incision and seton drainage radical surgery may be required for the perianal abscess. Post-surgery, thorough disinfection and drainage of the local wound are also necessary.