The symptoms of itching on the inside of the anus are mostly caused by internal hemorrhoids, anal fissure, anal sinusitis and other reasons. First of all, the most common cause is internal hemorrhoids. The formation of internal hemorrhoids is mostly related to the unhealthy living habits and eating patterns of the human body. Especially after the formation of hemorrhoids, the surrounding mucosa will be stimulated, which will cause itching on the inside of the anus. In addition, it will also affect defecation. Secondly, due to long-term dry stool and various bacteria stimulation, cracks appear in the anal canal, forming the symptoms of anal fissure, as well as itching due to feces and intestinal fluid stimulation. In addition, because of its special location, the anal sinus is often vulnerable to the influence and stimulation of feces and bacteria, causing edema and inflammation, which leads to anal sinusitis, thus stimulating the mucosa of the lower rectum at this location, leading to itching symptoms.
