The pain on one side of the abdomen during ovulation is commonly due to the following reasons: First, after ovulation, the corpus luteum is formed locally in the ovary and the pressure inside the corpus luteum increases, which can cause pain in the lower abdomen in individual women who are more sensitive, and the pain is on one side of the lower abdomen. Secondly, it may be that the painful side itself suffers from inflammation of the adnexa, which includes local inflammation of the ovaries, inflammation of the fallopian tubes, and inflammation of the uterine ligament, when the follicular fluid flows out, it may form a local stimulation, so it will lead to painful symptoms on one side. Pain on one side of the lower abdomen.