Left abdominal pain colonoscopy normal considerations may be caused by irritable bowel syndrome, if a female patient to consider may be caused by adnexitis, it is recommended to go to the hospital in time for treatment. 1. Irritable bowel syndrome: a common dysfunctional syndrome, due to gastrointestinal dysfunction, anxiety, stress, depression and other psychological factors, manifested in the appearance of the symptoms of the left lower abdominal pain, but do colonoscopy normal performance, the patient will also have constipation, diarrhea and other symptoms. It is recommended to take medication under the guidance of a doctor, such as scopolamine tablets, montelukast and so on. 2. Adnexitis: it is usually caused by infection, with symptoms such as prolonged pain in the left lower abdomen, increased secretion, etc. Since the adnexa can not be seen in colonoscopy, colonoscopy is shown to be normal, and it is recommended to apply antibiotic treatment under the guidance of the doctor, such as injectable doxycycline hydrochloride, injectable cefoxitin sodium, etc. In severe cases, surgical treatment is needed. In serious cases, surgical treatment is needed, such as transvaginal incision and drainage of pus. There are other reasons for the left abdominal pain enteroscopy is normal, it is recommended that the patient timely consultation, to identify the cause of the disease. At the same time, patients are advised to pay attention to rest, eat a light diet, avoid spicy stimulating food.