Welcome to HCM.
I wish to answer as it looks like you need early help and DR CHANDAN may be little busy. He may also answer once he is free.
This is typical infection of the glans
and the foreskin.
He needs in addition, topical antibiotics like bacitracin/soframycin/fucidin
Diabetic control is needed if he has high sugar.
THIS IS NOT DUE TO PASSING URINE IN COMMON PLACES.
More than anything, before things get worse, pls consult a nearby urologist
for examination and take immediate next step.