You must be having fungal infection.
Avoid steroid containing creams like Zole F etc.
application of steroid containing creams Betnovate etc just suppresses it on surface but it grows beneath the skin and spreads everywhere and also becomes more resistant.
Next Steps
Visit personally for treatment options.
Health Tips
Top 10 Ways to Keep Fungal Infection at Bay !" by Dr. Jolly Shah Kapadia - https://www.practo.com/healthfeed/top-10-ways-to-keep-fungal-infection-at-bay-24925/post