After perianal abscess eradication surgery after the seventh day of pain aggravation, may be considered incomplete surgery or re-infection and abscess formation. Perianal abscess is a common anorectal disease, the patients are mostly young adults, mainly refers to the acute infection of the soft tissue around the anal canal or perianal space, often accompanied by pain, hard lumps, redness and fever. For the treatment of perianal abscess, due to the existence of individual variability, the effect of drug treatment is limited. Once the diagnosis of perianal abscess, as soon as possible to perform perianal abscess surgery, because the perianal skin is more sensitive, so the postoperative pain is still more obvious. However, if the pain is not alleviated or even aggravated after the perianal abscess eradication surgery, it may be due to the healing process of perianal abscess, the deep tissues are not completely healed, forming deep abscess or re-infection, ultrasound can be done to clarify whether there is abscess formation in the deep part of the body, if necessary, puncture examination. If the pain worsens after the seventh day after the perianal abscess eradication surgery, you need to actively consult the doctor to clarify the cause of the disease and then carry out targeted treatment to avoid aggravation of the condition.