It can be due to fungal infections
Get checked
There are good ointments available
Next Steps
Don't use ointments with steroids
Health Tips
wash with ordinary soap and water
apply ointment with clotrimazole as antifungal agent plus some antibiotic in it
powder coat of Absorb is equally effective and safe
you can apply for 3 -4 times in a day
try for a week
get checked by local doctor