What is the painful pain in the anus sometimes?

Anal throbbing pain when defecating: one, it may be in the acute attack of thrombosed external hemorrhoids; two, it may be due to an abscess in the perianal area. Thrombosed external hemorrhoids are mainly formed when the patient has difficulty defecating due to prolonged consumption of spicy and stimulating food, as well as overexertion during defecation, causing the subcutaneous veins around the anus to rupture and bleed and blood to pool. Acute attacks of thrombosed external hemorrhoids are stimulated during anal exhaustion, producing throbbing pain, swelling, and foreign body sensation, which can be especially strong during defecation. Patients with perianal abscesses are often also accompanied by intense pain due to the abscess surrounding the anal opening. The symptoms will be reduced after the abscess has collapsed, but they will also produce symptoms similar to throbbing pain when venting through the anus, defecating, and when abdominal pressure increases anal jerking. Patients with external hemorrhoids are advised to use hemorrhoid creams and liquid fumigation to control their symptoms and observe whether the thrombus will be gradually absorbed, while patients with perianal abscesses need to seek immediate medical attention to avoid the expansion of the ulcer to cause anal fistula.