Perianal abscess hard lump for a year without pus may be caused by scar tissue proliferation. Perianal abscess is usually due to anal gland infection, anemia, diabetes and other factors, resulting in inflammatory lesions of the rectal anal canal and the surrounding soft tissues, and its clinical symptoms are mostly manifested as lumps, pain, abscesses and so on. If the patient has a perianal abscess hard lump for a year without pus, it may be due to the chronic inflammatory reaction left behind, so that the patient has scar tissue hyperplasia caused. Perianal abscess hard lump for a year without pus can be diagnosed through medical history, physical examination, rectal palpation, local soft tissue ultrasound and other related examinations, and early preventive treatment. If the patient is due to scar tissue hyperplasia caused by the discomfort symptoms, can be used under the guidance of the doctor sitz bath to soften the plaque, so as to play a role in relieving the condition. Perianal abscess patients with hard lumps and no pus for a year, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease, and under the guidance of the doctor according to the actual situation to choose the appropriate drugs or reasonable methods of treatment.