Recurrent fever after perianal abscess surgery may be caused by wound infection or pus accumulation, or it may be caused by other reasons, such as suffering from a cold. 1. Wound infection: Perianal abscess surgery will have a wound, if you do not take good care of the wound after the operation, resulting in local bacterial infection, you may have recurrent fever. 2. Pus accumulation: If the original wound is not properly treated during the perianal abscess surgery, and the wound is simply incised and drained, there is still pus inside the wound, which will lead to pus accumulation after the wound is closed, and thus the phenomenon of recurrent fever may occur. 3. Cold: If the patient’s own resistance is relatively poor, the body is invaded by bacteria or viruses, resulting in a cold, it is also easy to have recurrent fever. Repeated fever after perianal abscess surgery may also be caused by other reasons, specific need to go to the regular hospital, a clear diagnosis, so that targeted treatment and treatment, to avoid delaying the condition.