welcome to hcm
thanks for the query
bibek, can you please mention your age?
is it itchy?
it appears to be tinea
generally it subsides in a week or two.if its not subsiding then do a blood test
for sugar level ,both fasting level and post- prandial level.if you are obese
then reduce you weight.
do you have any health related problems?any habits?
continue the same treatment. your doctor can add one mild steroid
cream for 5 to 6 days .
also keep thatt area dry.change underwear daily.avoid tight clothes.use cotton one.