If you find your underwear wet after waking up, it may be caused by the following reasons: 1. During ovulation there is a physiological increase in leucorrhea because the hormone level in the body has changed and in order to make the sperm pass through the cervix more smoothly, so the mucous membrane of the cervix will appear diluted under the action of the hormone level, so the vagina will discharge more secretions. The secretions are similar to egg whites and are particularly well stretched, with no odor or only a faint fishy smell. 2. Before menstruation, due to the strong secretion of the endometrial glands, they also cause a large amount of secretions to be discharged outside the vagina, and when you wake up, you find that your underwear is wet. These are the main reasons why women find their underwear wet when they wake up. If there is inflammation of the vagina, there will also be an increase in secretions, resulting in a wet feeling in the underwear and yellowish color of the secretions, which will also be accompanied by odor or vulvar itching.