Urethritis after unclean sexual contact may be trichomonas urethritis, gonorrhea urethritis, etc., half a year of medication is always repeated, coitus is still painful, may be due to trichomonas vaginitis, gonorrhea, and may be due to the patient at the same time accompanied by cervicitis and other diseases caused by the cause of the different reasons, and therefore the treatment of medication is not the same. 1. Trichomonas vaginitis: Trichomonas vaginitis is a disease caused by trichomonas infection, the disease can lead to patients with six months of medication is always recurring symptoms of coitus and pain, the patient can appear increased vaginal discharge, vulvar itching, burning, pain during intercourse and other symptoms, treatment can be used to treat metronidazole, tinidazole and other drugs. 2. Gonorrhea: Gonorrhea is a disease caused by Neisseria gonorrhoeae infection, the disease can lead to patients with six months of medication is always recurring symptoms of coitus and pain, the patient may appear red, swollen and painful cervical orifice, vaginal pus or bloody secretion out of the symptom, the treatment of ceftriaxone sodium, cefotaxime, and other drugs can be used for treatment. 3. Cervicitis: cervicitis is an inflammatory disease of the cervix, patients suffering from urethritis, if they suffer from cervicitis, then it will also lead to the symptoms of pain in the coitus, the treatment can be different pathogenic microorganisms using doxycycline, azithromycin and other drugs for treatment. In addition to the above diseases, other factors can also lead to patients with urethritis medication half a year is always back and forth with the symptoms of pain, it is recommended to timely consultation, identify the causes, please doctor to deal with.