The causes of perianal abscess include anal gland infection, other causes, etc. People with low immunity or poor bowel habits are prone to attacks. 1. The main cause of perianal abscess is anal gland infection because bacteria and feces are easily retained in the anal canal, which may cause inflammation, spread to the anal glands causing blockage, and lead to anal gland infection. Because of the accumulation of pus, bacteria, and necrotic tissue, a perianal abscess can form. Other causes include anal fissure, internal hemorrhoids, and sacrococcygeal osteomyelitis. 2. People with low immunity and bad bowel habits are prone to perianal abscess. For example, diabetes, tuberculosis people; perianal local hygiene is not good people due to bacterial growth caused by perianal rectal infection; long-term constipation people are prone to anal fissure, secondary perianal abscess and so on. It is recommended that people pay attention to perianal hygiene and cleanliness; eat more food rich in dietary fiber to improve constipation; exercise properly to improve immunity; avoid staying up late and working hard. If the diagnosis of perianal abscess is confirmed, it is recommended to actively seek medical treatment to avoid delaying the aggravation of the condition.