Hello and welcome to HCM.
You are suffering from fungal infection
of the area known as Tinea cruris
and Tinea corporis
are not at all the anywhere anytime part of treatment of this condition so immediately stop it otherwise your infection may get spread all over body. This condition is known as Tinea incognito
( you get initial benefit when you use steroids but then it flares up).
The best treatment is oral and topical treatment of antifungals with advice of your doctor which will improve the condition dramatically.
Other than that you should also understand that to prevent recurrent infection you must take daily bath with soap, maintain proper hygiene, wear cotton clothes, change your undergarments two times a day, maintain a dry environment to prevent growth of fungus.
With best health wishes,
Dr Sanjay Kumar Kanodia