Stabbing pain inside the anus may be related to sinusitis, external hemorrhoids, perianal abscess and other causes, need to be further differential diagnosis by the doctor. 1. Sinusitis: due to bacteria and other pathogens frequenting the sinus area, can cause a local inflammatory reaction, can appear inside the anus stinging phenomenon. 2. External hemorrhoids: due to varicose veins and stagnation near the anal opening, external hemorrhoids are formed, causing pain or itching in the anal area. 3. Perianal abscess: As the perianal and rectal area and interstitial space are infected by purulent bacteria such as staphylococcus, an abscess is formed, which can cause pain, swelling and other symptoms in the anus or rectum. Tingling inside the anus, there may be other causes, it is recommended that patients go to the hospital in a timely manner to clarify the cause of the disease, standardized treatment under the guidance of the doctor, so as to avoid delays in the condition of the body to bring adverse effects.