What are abscesses and anal fistulas? Abnormal connections between the anal canal and skin-lined structures.
Anal abscesses and fistulas are painful conditions affecting the anal region. An abscess is a localized infection with an accumulation of pus, often resulting from the obstruction of an anal gland. When an abscess doesn’t heal properly, it can develop into an anal fistula, an abnormal tunnel between the infected gland and the skin near the anus. Both conditions can cause considerable discomfort, swelling and drainage. They are usually treated by surgery, which offers relief and prevents the recurrence of infection. Fistulas can also form between the bowel and the bladder or vagina, causing leakage of fecal matter from either organ.