The hidden pain in the left lower abdomen of the elderly may be caused by proctitis, adnexitis and intestinal tumors. 1. Proctitis: due to bacterial infection after the attack of enteritis, inflammation stimulation of the intestinal tract caused by spasms and pain, can also lead to the elderly lower left abdominal pain. 2. Adnexitis: for women, it may be caused by adnexitis. Adnexitis occurs due to inflammation caused by the body’s low immune function and invasion of exogenous pathogens. The upward spread of inflammation will lead to the appearance of adnexitis and cause hidden pain in the left lower abdomen in the elderly. 3. Intestinal tumor: it may be due to the large size of the primary tumor in the patient’s body, blocking the patient’s intestinal tract and preventing the elderly from defecation, leading to a certain degree of abdominal distension and pain in the left lower abdomen of the elderly, resulting in hidden pain in the left lower abdomen of the elderly. When the elderly have the symptom of pain in the lower abdomen, their family members should take them to regular hospitals for relevant examination in time and cooperate with doctors for active treatment.