Hello My Son S Anus Infected By Strep And He

hello my son s anus infected by strep and he took cephalexin syrup and mupirocin ointment for 12 days but he still has problem
and now his penis burns too ,I think he is symptom of UTI ,he has this problem more than 2 month , before this medicine he also took amoxicillin syrup , augmentin syrup, hydrocortisone ointment and clotrimazol ointment and mebendazol 2 tablets. I need your advice , thank you