Hidden pain in the lower left side of the stomach may be due to ulcerative colitis, intestinal spasm, pelvic inflammatory disease and other causes, it is recommended to use anti-inflammatory, relieve spasm of the drug treatment, different causes, the choice of drugs in the treatment of the existence of variability, can not be blindly self-treatment with drugs. 1. Ulcerative enteritis: It is recommended to use Liuzosulfapyridine, methylprednisolone, mesalazine, infliximab and other drugs under the guidance of the doctor. If necessary, it is also necessary to choose intestinal probiotics treatment, such as: bifidobacteria, bacillus licheniformis and other medications. 2. Intestinal spasm: it is recommended to take oral pivoxyl bromide, atropine and other medications. 3. Pelvic inflammatory disease: it is recommended to use azithromycin, metronidazole tablets, gynecological thousand gold tablets and other drugs under the guidance of the doctor. If you regularly feel the symptoms of pain in the lower left side of the stomach, it is not recommended to treat yourself with medication, first go to the hospital, relevant items for examination, clear cause, follow the doctor’s instructions on the cause of the treatment, some diseases in addition to medication, if necessary, you need to choose a surgical procedure.