What causes anal fissure

summary

Many people have anal fissure in our life, but there are many reasons for this disease, which has a lot to do with our life. The occurrence of anal fissure is more common in our daily life. Anal fissure brings serious harm to the anus of patients' friends. Therefore, we must treat the occurrence of anal fissure in a timely manner. What is the explanation about what causes anal fissure?

What causes anal fissure

1. Trauma: Patients with chronic constipation, due to dry stool, defecation force is too strong, easy to damage the anal skin, repeated damage to the deep and full-thickness skin laceration, the formation of chronic infectious ulcer. It was reported that constipation caused anal fissure accounted for 14% - 24%, but constipation may also be the consequence of anal fissure, because patients are afraid of defecation. In addition, birth injury can also cause anal fissure, accounting for about 3% - 9%. Diarrhea frequent defecation, anal sensitive tightening is also easy to damage, repeated damage to the formation of chronic infectious ulcer. 　　

2. Infection: chronic inflammation near the dentate line, such as anal sinusitis in the posterior midline, spreads downward and leads to subcutaneous abscess, ulceration and chronic ulcer; the reason why anal canal injury is difficult to heal is still unknown. Some people think that it is mainly caused by injury and infection. When infected, inflammatory cells can release lysozyme to prevent epithelial tissue regeneration and extension. 　　

3. Ischemia: Recently, it has been suggested that ischemia of the posterior midline of the anal canal is the cause of anal fissure, because the distal end of the anal canal is supplied by the inferior rectal artery, which passes through the ischiorectal fossa and branches to the mucosa through the sphincter of the anal canal, but most of the posterior junction lacks the inferior rectal artery branch (85%). The morphological study of the capillaries also indicated that the capillaries in the internal sphincter of the posterior midline were sparse. The blood flow in the posterior anal junction was less than that in other quadrants. All above indicate that ischemia is the main factor of chronic anal fissure.

matters needing attention

About what causes the anal fissure, we all know it, the emergence of anal fissure brings us more serious harm, so we usually daily life for the occurrence of anal fissure this disease is must pay attention to, timely go to the regular hospital for treatment.