Over time, anal fissures can develop into old anal fissures. Old fissures are difficult to heal because they are accompanied by spasm of the anal sphincter, which leads to poor blood supply around the fissure and the formation of a white ulcer over time. If you want the fissure to heal as soon as possible, you need surgical intervention, you need to do anal sphincter release or manual anal dilation to return the sphincter to its normal state, so that the blood supply around the fissure will be richer and bring sufficient nutrition, and the fissure can grow back quickly. In addition, old anal fissures can form constipation, and constipation and anal fissures repeatedly stimulate each other, it is difficult to heal, so surgery is needed as soon as possible.