Recurring Abscesses and Symptoms in Crohn's Disease - Surgery

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Abscess and Rectum


Two years ago, I underwent surgery for an anal abscess drainage, but now the wound area has started to ooze pus again.
When I exert pressure on my anus while urinating, I mistakenly thought it was stool, but it turned out to be a thick, dark-colored pus resembling phlegm.
What could be the issue? I also have Crohn's disease.

Xiao Tian, 20~29 year old female. Ask Date: 2015/08/05

Dr. Ke Fangxu reply Surgery


Anal abscesses or fistulas associated with Crohn's disease are prone to recurrence.
Based on your description, it is likely that you are experiencing a recurrence of an anal abscess.
It is advisable to seek medical attention at a hospital as soon as possible.
If the infection is not severe, oral antibiotics may be used for treatment; however, if it is severe, further surgery may be necessary.

Reply Date: 2015/08/05

More Info


Recurring abscesses in patients with Crohn's disease can be a significant concern, as they may indicate underlying complications associated with the disease. Crohn's disease is a type of inflammatory bowel disease (IBD) that can affect any part of the gastrointestinal tract, but it most commonly affects the terminal ileum and the colon. One of the complications of Crohn's disease is the formation of fistulas and abscesses, particularly in the perianal region.

Given your history of an anal abscess that required drainage two years ago, the recurrence of pus at the same site could suggest several possibilities. First, it is essential to understand that Crohn's disease can lead to chronic inflammation and damage to the intestinal wall, which may result in the formation of fistulas—abnormal connections between the intestine and other structures, such as the skin or other parts of the intestine. These fistulas can become infected, leading to the formation of abscesses.

The symptoms you describe—pus that resembles phlegm and is dark in color—could indicate an infection at the site of the previous abscess or a new abscess forming. The presence of dark-colored pus may suggest that there is necrotic tissue or a more complicated infection, which requires prompt medical evaluation. Additionally, the sensation of needing to pass stool when urinating could indicate that there is a fistula between the rectum and the urinary tract, which is a known complication in patients with Crohn's disease.

It is crucial to seek medical attention from a gastroenterologist or a colorectal surgeon who specializes in Crohn's disease and its complications. They may recommend imaging studies, such as an MRI or a CT scan, to assess the extent of the disease and to determine if there are any fistulas or abscesses that need to be addressed. Treatment may involve antibiotics to manage the infection, and in some cases, surgical intervention may be necessary to drain the abscess or repair any fistulas.

In managing Crohn's disease, it is also essential to ensure that the underlying inflammatory process is adequately controlled. This may involve adjusting your current medication regimen, which could include immunosuppressive therapies or biologics that target specific pathways in the inflammatory process. Regular follow-up with your healthcare provider is vital to monitor your condition and adjust treatment as necessary.

In summary, the recurrence of pus at the site of a previous anal abscess in a patient with Crohn's disease warrants immediate medical evaluation. It is essential to rule out complications such as fistulas or new abscess formation and to ensure that the underlying disease is being effectively managed. Prompt treatment can help prevent further complications and improve your quality of life.

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