Too hard stool leads to anal fissure bleeding specific how to cure, depending on whether the anal fissure is old or fresh anal fissure specifically as follows: 1. Fresh anal fissure: If it is a mild, fresh anal fissure, it can be treated by means of conservative treatment, such as local fumigation with potassium permanganate dilution, sitz bath, or you can also choose local application of hemorrhoid cream, and at the same time to timely laxative to avoid constipation. If there is significant pain, you also need active pain relief and symptomatic treatment, some anal fissures can heal. If the conservative treatment does not heal, surgery is needed. 2, old anal fissure: most of the old anal fissures need timely surgery, because anal fissures bleed and accompanied by obvious pain, because of the fear of pain, and constipation, so repeated cycles, it is difficult to heal themselves, so most of the surgical treatment is needed, the specific surgery is recommended to consult a specialist doctor at a regular specialist hospital.