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Short answer How an anorectal abscess is treated Common questions Related questions Sources**Most anorectal abscesses start when one of the tiny glands inside the anal canal gets blocked and infected, so bacteria multiply and pus collects in the tissue around it.**
The picture changes when something else is driving it: Crohn's disease, an anal fissure, a sexually transmitted infection, or injury from trauma, childbirth, or previous surgery can all set one off. Weakened immune defenses from diabetes, HIV, cancer treatment, or long-term steroid use make an abscess more likely and slower to clear. Abscesses that keep coming back, or that sit in unusual places, point toward an underlying condition worth testing for, especially Crohn's disease. Keeping stool soft with fiber, fluids, and prompt treatment of constipation limits irritation of the anal canal, and warm sitz baths ease early soreness. An abscess almost always needs drainage by a clinician, so a firm, swollen, painful lump near the anus is a reason to be seen quickly.
How an anorectal abscess is treated
Common questions
What causes Anorectal abscess?
Most anorectal abscesses are cryptoglandular: one of the small glands in the anal canal becomes blocked, bacteria multiply, and pus collects in the nearby tissue. Other causes include Crohn's disease, an anal fissure, a sexually transmitted infection, trauma from injury or surgery, and blocked skin structures such as an infected hair follicle or a pilonidal sinus. Diabetes, HIV, chemotherapy, and long-term steroid use raise the risk because they weaken infection control, and constipation with hard stool adds irritation. See a clinician promptly, since an abscess usually needs drainage rather than antibiotics alone.