Yellowing of underwear is seen in a variety of conditions, such as vaginitis, cervicitis or celiac disease, which are common in gynecology, or diseases of the urogenital system. If you don’t change your underwear in time and don’t pay attention to personal hygiene and other non-disease conditions, it can cause yellowing of your underwear. 1. Vaginitis: it may cause more vaginal discharge, which is yellow or purulent, and may be combined with vulvar itching or vaginal itching, and the type of vaginitis can be clarified through the leucorrhea examination, and appropriate drugs can be chosen according to different vaginitis. For example, for mycotic vaginitis, vaginal application of nifurtimox suppositories, clotrimazole suppositories, or mycoplasma suppositories or effervescent tablets is effective. In case of trichomoniasis, 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-based suppositories can also be applied vaginally. For anti aerobic vaginitis, clindamycin suppositories or gel are needed. 2. Cervicitis: There may be purulent discharge from the cervical canal, causing yellowing of the underwear, possibly combined with mycoplasma or chlamydia infection, and some patients may have gonococcal infection. The culture of the secretion can be performed to clarify the specific causative organism. You can start with empirical medication, oral azithromycin for both husband and wife; 3. Cervical erosion: that is, the cervical columnar epithelium is ectopic to the outside and covers the squamous epithelium, a kind of pseudo-erosion. Because the columnar epithelium is thin, it is prone to co-infection, which can lead to yellowish or purulent discharge. Mild cases do not require treatment, while more severe cases can be treated with some medications for vaginitis, such as celiac suppositories or suppositories for other inflammatory conditions that are also effective in some patients. The main thing is to do cervical cancer examination, if there is no problem with cervical cancer examination, it can be observed; 4. Genitourinary system diseases: such as urinary tract infection, due to inflammatory infection resulting in cloudy urine, urine impregnation to the underwear can appear yellow underwear, accompanied by frequent, urgent and painful urination and other symptoms. In addition, male-specific diseases such as glansitis, can have purulent secretions, resulting in yellowing of underwear; 5, other: in addition to the above-mentioned diseases, tubal inflammation, tubal blockage, gynecological cancer and many other diseases, can also appear yellowing of underwear; 6, non-pathological conditions: if you do not pay attention to personal local hygiene recently, or drink too little water, the situation of fire, and then yellowing of urine, will also cause underwear Yellowing.