Metronidazole is generally used to treat urethritis caused by anaerobic infections. Urethritis is commonly caused by bacterial infections, gonococcal infections, and chlamydial mycoplasma infections. Generally because of drinking less water, or unclean sex, the proximity of the organs of the infection caused, may also be a mixed type of infection, you can use metronidazole effervescent tablets for external use, or cleaner, chlorhexidine, potassium permanganate diluent cleaning of the vulva, oral metronidazole, cephalosporin antibiotics, do not eat spicy and stimulating food.