Hemorrhoids are soft venous clusters formed by congestion, expansion and flexion of the venous plexus under the mucosa of the rectum and under the skin of the anal canal. Hemorrhoids are a common disease and frequently-occurring disease. The incidence of hemorrhoids accounts for the first place in anorectal diseases, about 80.6%. The disease can occur in any age group, but the 20-40 years old is the most common. Mainly manifested as the three major symptoms of blood in the stool, prolapsed mass and protruding skin on the anal margin.
Hemorrhoids are divided into 3 categories according to their different parts
(1) Internal hemorrhoids: located above the dentate line, it is caused by enlarged varicose venous plexus of the superior rectum. The surface is covered by mucous membranes. It usually occurs in the left middle, right anterior and right posterior 3 places of the lower rectum (lithotomy positions 3, 7, and 7). 11 o'clock), often have a history of blood in the stool and prolapse.
1. Hemorrhoids in stage I: bleeding during defecation, no prolapse, no pain.
2. Hemorrhoids in stage II: bleeding during defecation and prolapse of internal hemorrhoids. You can repay it yourself.
3. Hemorrhoids in stage III: When the intra-abdominal pressure increases, the internal hemorrhoids are easy to protrude out of the anus and must be returned by hand.
4. Hemorrhoids in stage IV: prolapse of internal hemorrhoids, which cannot be completely returned or prolapsed after reaping.
(2) External hemorrhoids: There is no feeling at ordinary times, only the skin protruding on the anal margin or foreign body sensation in the anus are seen. When the bowel movement is too strong, the perianal subcutaneous veins rupture and form thrombus or infection, causing severe pain. Divided into connective tissue external hemorrhoids, varicose external hemorrhoids, and thrombotic external hemorrhoids (the most common).
(3) Mixed hemorrhoids: They are located near the dentate line. Because the upper and lower rectal venous plexus communicate with each other, they can be expanded and flexed at the same time. The surface covers the skin and mucous membrane junction tissues. It has two characteristics of internal and external hemorrhoids.