Patients with anal cramps and small stomach pain may be caused by inflammatory bladder diseases, gynecological inflammation, rectal lesions and other reasons. 1. Urological diseases: anal distension and small stomach pain may be caused by urinary system diseases, such as cystitis, bladder stones, ureteral stones, etc., and some patients may also be accompanied by frequent urination, urinary urgency and other symptoms. 2. Gynecological inflammation: when the patient suffers from gynecological inflammation, such as adnexitis, pelvic inflammatory disease, etc., it may lead to pelvic fluid accumulation, which can stimulate the anus, causing anal swelling, abdominal pain and other symptoms. 3. Rectal lesions: patients with anal distension and stomach pain may also be due to rectal lesions, such as proctitis, rectal tumors, rectal polyps, etc. In addition, hemorrhoids may also cause such a situation, especially hemorrhoids combined with the infection when the symptoms are more obvious. It is recommended that the patient timely medical examination, clear causes for targeted treatment, pay attention to rest in life, work and rest, avoid strenuous exercise, do a good job of monitoring the condition, regular review.