Hidden pain in the left lower abdomen with difficulty in defecation may be caused by chronic colitis, colon polyps, intestinal obstruction, etc. It can be treated by general treatment, drugs (prednisolone, domperidone, amoxicillin, etc.), and surgery under the guidance of a doctor. 1. Chronic colitis: the disease is mainly caused by infection, immunity, genetics and other factors, patients need to pay attention to rest, warmth, regular diet, can also be treated by drugs, commonly used drugs are prednisolone, domperidone, lactulose, etc.. 2. Colon polyps: when stimulated by inflammation, genetic factors, genetic mutations and other factors, will lead to patients with left lower abdominal pain with defecation difficulties, patients should increase the intake of fiber, reduce the intake of fatty foods, but also through the use of amoxicillin and other drugs to fight bacterial infections, but also through endoscopic or surgical resection. 3. Intestinal obstruction: affected by neuroinhibition, toxin stimulation, mesenteric vascular embolism and other factors, it will lead to the patient’s left lower abdominal pain with difficulty in defecation, the patient needs to decompression through the gastrointestinal, suction out of the gastrointestinal tract of the gas and liquid, reduce abdominal distension, but also through surgical treatment, commonly used surgical resection and intestinal anastomosis, short-circuit surgery, intestinal stoma or intestinal externalization, and so on. It is recommended that patients go to the hospital in a timely manner, under the diagnosis of the doctor, according to the patient’s specific condition performance, to take targeted treatment.