Anal fissures and constipation are generally accompanying symptoms. When the stool is dry, the patient exerts excessive force during defecation, causing the stool to tear the local anal sphincter and mucosa, resulting in an anal fissure. Prolonged and recurrent anal fissures, due to the contraction of the local anal sphincter, can make defecation difficult for patients, or, because of the severe pain during defecation, patients may avoid defecating. This leads to stool remaining in the intestinal lumen for too long, causing the stool to dry out and further inducing constipation. To treat anal fissures and constipation, it is first necessary to lubricate the stool. One can take oral medications for lubricating the intestines and easing bowel movements or use topical lubricants. Treatment can also be complemented with anal dilation therapy or surgery through endoscopic incision, and applying a traditional Chinese medicine hot compress to the local fissure.