The yellowing of pregnant panties can be considered as physiological and pathological factors. In this case, the causes should be clarified and treated accordingly. Common causes and treatment measures 1, physiological factors: pregnant women due to the influence of sex hormones, leucorrhea increased, from the vaginal discharge after staying in the panties, a long time to accumulate into a solid state, resulting in the yellowing of the panties phenomenon. Although the leukorrhea itself is not abnormal, but if it is not treated or cleaned in time, it can lead to bacterial contamination of the private parts and cause gynecological diseases such as vaginitis. Pregnant women should pay attention to perineal cleanliness and change their underwear regularly. 2. Pathological factors: when the underwear is yellow, we should pay attention to whether there is vulvar itching, whether the discharge is yellow, and whether there is odor. If it is caused by pathogenic infection, you can use drugs that do not affect the fetus under the guidance of doctors according to different pathogens, mostly using local medication, and do not have sex during the medication. Pregnant women should pay attention to the condition of vaginal discharge and seek early medical attention if there is any abnormality; 2. Pay attention to keep the perineum clean and change underwear regularly to avoid infection; 3.