Anal swelling and pain after defecation is usually related to constipation or anal fissure, and it is recommended to relieve the symptoms through daily life style and medication intervention. 1. Adjustment of daily life style: If the anal swelling and pain after defecation is caused by constipation or anal fissure, you can reduce the intake of spicy and stimulating foods in daily life, and eat more fiber-rich foods, including sweet potatoes and oatmeal. 2. Pharmacological intervention: when the anal swelling and pain after defecation is more serious, you can also use laxatives to intervene under the guidance of a doctor, usually including lactulose, polyethylene glycol 4000 bulk, etc., so as to soften the stool and reduce the impact of the symptoms on the organism. In case of anal swelling and pain after defecation, it is recommended to go to the hospital for early treatment.