Respected user, hi I evaluated your query . *Need certain relavant information - age - associated burning - any history of trauma to genitals / fall - duration of the symptoms - any other associated medical ailments like Diabetes ? *In absence of above I would answer as : @Clinical differential diagnosis includes - phimosis - urethritis - urethral stricture - posterior urethral valve. @In our clinic , we recommend fluoroquinolone group of antibiotics with anti-inflammatory agents , cranberry sachets for 5 days to counteract underlying bacterial inflammation even though ultrasound is normal. @Get a Fasting blood sugar, S. Creatinine & urine examination done. *Give plenty of liquids and maintain hydration. *Keep genitals clean , dry , make to wear loose cotton undergarments. *Councel him with patience regarding any issue of psychological conflict manytimes happens with children and it goes on long term without notice. Hope this clears your query. Thanks for using Health Care Magic and keeping trust in our medical services. Wishing your child a happy healthy life ahead. Regards. Bye Dear take care of your Engel.