Yellowish leukorrhea and lumbosacral pain may be caused by trichomoniasis, cervicitis, endometritis, etc. Some medications such as ceftriaxone and metronidazole can be applied for treatment. 1. Trichomonas vaginitis: the common symptom of trichomonas vaginitis is purulent discharge, mostly yellow, accompanied by odor, combined with urinary tract infection may also cause back pain. It can be treated with drugs such as metronidazole and tinidazole. 2. Cervicitis: cervicitis can be manifested as increased purulent discharge, back pain, fever and other symptoms, for different pathogens need different drugs, gonococcus can be caused by oral ceftriaxone and other drugs, chlamydia can be caused by erythromycin and other drugs. 3. Endometritis: common symptoms are lower abdominal pain, increased purulent discharge, lumbago and other symptoms. Then you need to use different drugs for different pathogens. Gonococcus can apply ceftriaxone and other drugs, mycoplasma or chlamydia can use erythromycin, clindamycin and other drugs. The symptoms of yellowing of the lumbar sacral pain, need to go to the hospital in time to improve the relevant examination to clarify the cause of the disease, under the guidance of the doctor’s symptomatic treatment, to avoid unauthorized use of drugs.