The left side of a woman’s belly button is parallel to the left side of the human body, and the left abdominal organs include the uterine appendages, small intestine and ureter. Therefore, when the left abdominal pain, most commonly caused by cold or eating cold food stimulation, followed by more consideration and gynecological diseases, intestinal diseases, urological diseases, etc., it is recommended that women go to the hospital for timely examination to clarify the specific causes and take targeted treatment. A, gynecological diseases: 1, dysmenorrhea: women during menstruation pelvic congestion or abnormal contraction of the uterus, easily lead to pain in the small abdomen, may appear left abdomen or right abdomen, or even the entire small abdomen will have pain. Therefore, women are advised to pay more attention to keep warm in daily life and eat less spicy and stimulating and cold food. If the pain is strong, you can also take oral pain medications, such as ibuprofen, for relief. If the pain cannot be relieved, you should seek medical advice to exclude other pathologies such as adenomyosis. After excluding the pathology, you can take some cholinergic drugs and beta agonists under the guidance of a doctor to relieve the pain; 2. Pelvic inflammatory disease: Mostly seen in women of childbearing age, caused by low autoimmunity. This symptom is commonly caused by inflammation of the left fallopian tube and ovary, and usually manifests as pain in the left abdomen, which is persistent and accompanied by increased vaginal discharge, change in nature and unpleasant odor such as fishy smell, watery mucus leucorrhea, as well as fever and fatigue. You should seek medical advice for anti-inflammatory treatment, such as penicillin, cephalosporin and other antibiotics. For patients with localized masses, tubal cysts or inflammation prone to recurrence, surgical treatment is required if necessary. It can also be assisted by physical therapy to relieve discomfort, such as hot compresses, infrared irradiation and other methods, in addition to external application of Chinese medicine packs, Chinese medicine fumigation, etc.; 3. Gynecological tumors: triggering factors may be related to premature delivery, close delivery, unclean sex and poor lifestyle. Ovarian cysts, fallopian tube cancer and ovarian cancer on the left side of the abdomen can also cause different degrees of pain in the left parallel position of the navel. Clinical treatment is often carried out through surgical methods according to specific conditions, such as hysteroscopic therapy, traditional open surgery, etc. After surgery, radiotherapy and targeted therapy can also be used as an adjunct. Second, intestinal diseases: the cause of the disease is mostly related to the reduction of autoimmunity, poor dietary habits, intestinal flora imbalance, etc. Commonly, such as descending colon, sigmoid colon discomfort symptoms are mostly concentrated in the left abdomen. If inflammation, polyps, parasitic infections, tumors, intestinal obstruction, etc. occur here, there may be pain in the left side parallel to the navel, and targeted treatment should be given after consultation and examination for different diseases. Inflammation and parasitic infections require anti-inflammatory drugs, such as sulfadiazine and pyrimethamine, depending on the causative factors. Polyps require surgical treatment to remove them. Treatment of obstruction commonly includes conservative treatment and surgical treatment. Conservative treatment such as gastrointestinal decompression, fasting, correction of water-electrolyte and rehydration treatment; if conservative treatment is ineffective, surgical treatment can be performed according to medical prescription. If it is caused by tumor, the early stage can choose minimally invasive or open surgery to remove the tumor according to its location, followed by radiotherapy and surgery, which can help improve patients’ quality of life and survival rate after targeted treatment. Urinary system diseases: Most of them are urinary tract infectious diseases caused by the invasion of icogenic microorganisms due to the decline of autoimmunity, such as inflammation, stones, polyps, tumors and other diseases, all of which will cause pain in the left side of the navel. For inflammation, antibiotic drugs such as penicillin and cephalosporins can be chosen for treatment. Patients with mild stones need to drink more water to promote stone discharge, and can also apply local heat to relieve pain; those who cannot be discharged can choose to take lithotripsy medication, and if necessary, extracorporeal shock wave lithotripsy surgery can be performed. If it is a polyp in the urinary system, laser treatment can be performed to restore the ureter to patency. If it is a tumor of the urinary tract, more aggressive radiotherapy, surgery, and targeted therapy are needed to improve the prognosis. In conclusion, there are many causes for this condition. If the effects of cold and mild dysmenorrhea are excluded, it is necessary to visit a doctor to identify the cause. In addition, it is important to pay attention to a light and easy-to-digest diet during discomfort and avoid spicy, greasy, cold and other irritating foods that can aggravate discomfort.