3-year-old baby urine red, may be hygiene cleaning is not in place, urethritis and other factors lead to, the patient can follow the doctor’s instructions to use azithromycin tablets and other drugs for treatment. 1. hygiene cleaning is not in place: due to the 3-year-old baby does not pay attention to personal hygiene, resulting in redness of the urethra. Parents should use saline, potassium permanganate solution to clean the urethra, can relieve the symptoms of urethral redness. 2. Urethritis: usually due to urethral injury, pathogenic microbial infection and other factors leading to inflammatory lesions of the urethra. 3-year-old baby urethra will appear red symptoms, should be under the guidance of the doctor to take azithromycin tablets, erythromycin dispersible tablets, amoxicillin capsules and other drugs for treatment. 3-year-old baby redness at the urinary tract may have other reasons, it is recommended to consult a doctor in a timely manner, the patient under the guidance of the doctor reasonable use of drugs, to avoid blind self-medication, adverse consequences.