The odor in the lower body after pregnancy usually belongs to abnormal performance, usually seen in vaginitis or urinary tract infection, it is recommended to go to the hospital for examination to clarify the cause and treat the cause. Common causes and treatments 1, vaginitis: If you suffer from vaginitis, usually the color and discharge of vaginal secretions will change, and the smell will also change. Trichomonas vaginalis leucorrhoea is abundant, grayish yellow and thin and foamy; Pseudomonas vulvae leucorrhoea is abundant, curd-like or beanbag-like; bacterial vaginosis leucorrhoea is grayish white, homogeneous, thin and fishy smelling leucorrhoea, bacterial vaginosis is prone to premature rupture of fetal membranes and preterm delivery, routine prenatal checkups or after symptoms should be performed regarding these infections; atrophic vaginitis vaginal discharge is thin and pale yellow. In severe cases, the vaginal discharge is purulent and bloody. All of the above vaginitis are associated with vaginal itching, burning discomfort, a small amount of vaginal bleeding or urethral irritation such as frequent and painful urination. Except for vulvovaginal pseudomycosis, all other vaginitis can be treated with topical metronidazole; vulvovaginal pseudomycosis can be treated with soda solution for rinsing vulva and vagina or sitz bath, and also with topical topical application of mycobacterium, ketoconazole, clotrimazole, miconazole suppositories, etc. Because of the greater restriction on the use of drugs during pregnancy, medication treatment is also required under the professional guidance of a doctor; 2. Urinary tract infection: odor in the lower body after pregnancy. It may also be caused by urinary tract infection, which often does not constitute a serious problem during pregnancy, mainly manifested as frequent urination, urinary urgency, painful urination, and even local symptoms such as hematuria, lumbago, etc. There may also be systemic symptoms such as fever and chills at the same time, and there are some patients with no obvious clinical symptoms or no symptoms. It is very important for patients to take more rest and drink more water, and antibacterial drugs should not be used without strong evidence of bacterial infection. Usually penicillins, cephalosporins and macrolides are considered safe. The use of any antibacterial medication during pregnancy should be treated under medical supervision and the benefits should be weighed against the risks, which vary at different stages of pregnancy, and the severity of the infection and other treatment options available should also be considered. Pregnant women are advised to drink more water, wear loose and breathable underwear, pay more attention to hygiene, ensure that the perineum is clean and dry, bathe and change underwear regularly to prevent infection with vaginitis and other diseases. The use of drugs during pregnancy is more restricted, so you need to do preventive protection in advance.