How to prevent anal fissure? 1.Keep your bowels open, make it a habit to have regular bowel movements every day, and when you find that your bowels are dry, do not blame the bowels, but use warm saline enemas or open cork to inject into the anus to lax the bowels. 2, timely treatment of anal saphenous inflammation to prevent the formation of ulcers and subcutaneous fistula after infection. 3.When using an anal speculum for examination, do not use the speculum to operate roughly and damage the anal canal. 4, timely treatment of various diseases that cause anal fissures, such as ulcerative colitis, to prevent the occurrence of anal fissures. 5, to drink less, do not eat spicy stimulating food, food should not be too fine, with coarse and fine grains, vegetables and other fiber-rich food intake as much as possible, can keep the stool normal. 6, where there is perianal eczema, dermatitis, itching and other diseases should be actively treated to prevent perianal skin hardening, elasticity and tearing the skin of the anal canal. 7.For those who have anal canal skin injury, they should be treated actively to prevent ulcers from forming due to infection. 8.For those who have anal cryptitis and anal papillitis, they should be cured as early as possible to prevent inducing anal fissure. 9.When making anorectal examination, avoid rough force to avoid damage to the anal canal.