It should be an ovarian luteal cyst and not a luteinizing hormone cyst. Ovarian corpus luteum cysts usually form locally during the second half of menstruation, after the ovary is ovulated. The main reason for the formation of a cyst is the formation of the corpus luteum after ovulation, where there is a small amount of hemorrhage and an increase in local pressure. The diameter of this cyst is not larger than five centimeters, and it does not cause any symptoms, and often disappears or shrinks significantly after menstruation. Therefore, there is no need to give any treatment, observation is enough, it is recommended to do ultrasound examination after menstruation to know the condition of the cyst. In addition, do not be nervous about this case, and just give a review.