The yellowing of underwear is seen in a variety of situations, such as the common gynecological disease vaginitis, cervical canal inflammation or cervical erosion, or genitourinary system diseases. If you don’t change your underwear in time, don’t pay attention to personal hygiene and other non-disease conditions, can cause yellowing of underwear.1, vaginitis: may cause vaginal discharge is more, and yellow or purulent, may be combined with vulvar itching or vaginal itching, through the leukorrhea examination can be clear the type of vaginitis, according to the different vaginitis to choose the appropriate drugs. For example, mycotic vaginitis, you can vaginally apply nifurtimox suppositories, clotrimazole suppositories, or mycotoxin suppositories or effervescent tablets, the effect is good. If it is trichomonas vaginitis, both husband and wife need to take oral metronidazole or tinidazole at the same time. In the case of bacterial vaginosis, oral metronidazole or tinidazole is required, and metronidazole suppositories can also be applied vaginally. Anti aerobic vaginitis, need to use clindamycin suppositories or gel to treat; 2, cervical canal inflammation: the cervical canal will have purulent secretions, resulting in yellowing of the underwear, there may be a combination of mycoplasma or chlamydia infections, there are also some patients with gonococcal infections. The secretion culture can be carried out to clarify the specific causative organisms, you can first empirical medication, both husband and wife oral azithromycin; 3, cervical erosion: that is, the cervical columnar epithelium ectopic to the outside, covered with squamous epithelium, is a pseudo erosion. Because the columnar epithelium is relatively thin, it is easy to combine with the infection, which will lead to yellowish or purulent secretions. Mild cases do not need treatment, and more serious cases can use some drugs for vaginitis, for example, some patients use celiac pessary or suppositories for other inflammatory diseases are also effective. The main thing is to do the cervical cancer check, if the cervical cancer check is not a problem, you can observe; 4, genitourinary diseases: such as urinary tract infection, due to inflammation and infection leads to cloudy urine, urine impregnated with underwear can be yellow underwear, accompanied by frequent urination, urinary urgency, urinary pain and other symptoms. In addition, male-specific diseases such as glans penis, there can be purulent secretions, resulting in yellowing of the underwear; 5, other: in addition to the above diseases, salpingitis, tubal blockage, gynecological cancers and other diseases, can also appear yellowing of the underwear; 6, non-pathological conditions: if you do not pay attention to the recent personal local hygiene, or drinking too little water, the emergence of the situation of the fire, and then the yellowing of the urine, can also cause yellowing of the underpants. Yellowing.