There are many reasons for left side stomach pain during ovulation, mainly including follicular fluid stimulation, pelvic inflammatory disease, rupture or torsion of ovarian cysts, etc. The cause should be clarified and treated accordingly. Common causes and treatment methods: 1, follicular fluid stimulation: ovulation due to changes in estrogen levels, can lead to follicle rupture, follicular fluid and a small amount of blood can flow into the abdominal cavity, stimulating the peritoneum, causing patients to have symptoms of pain in the left lower abdomen during ovulation, generally without intervention, a few days later can be self-relieved; 2, pelvic inflammatory disease: pelvic inflammatory disease patients can show symptoms of lower abdominal pain, if pelvic inflammatory disease concentrated in the left abdomen, can appear ovulation If pelvic inflammatory disease is concentrated in the left abdomen, it can lead to pain in the left lower abdomen during ovulation, which should be treated with metronidazole, doxycycline and azithromycin as prescribed by the doctor, and if necessary, surgery can be performed in time to relieve the abdominal pain. Caution: Women should avoid strenuous exercise during ovulation to avoid intensification of painful symptoms. At the same time, a light diet, avoid spicy, cold and other stimulating foods, avoid staying up late, and develop good habits can properly relieve the symptoms.