Dermatology Questions? Ask an Online Dermatologist.
Can you attach the photos here? Itch or pain? Bleeding? How old are you? How tall are you? How much do you weigh? Any weight change? When did you notice it? Is it getting bigger? Any other symptoms? Are you aware of anything which might have triggered it? Any medical problems? Any surgeries? Any other medications including over-the-counter pills and herbs? Any family medical history?
It seems to be candida infection. Use the anti-fungal cream (betamethasone diproprionate & clotrimzole) twice a day until resolution. Resolution of active infection typically occurs within two weeks. Redness can remain after candida infection is successfully treated. A typical treatment course is two to four weeks.
If it doesn't resolute, you should see a dermatologist to have a skin biopsy.