Skin Rash

I was prescribed Oxistat today from my doctor for a rash on my inner thighs/groin area. However, I'm concerned with a number of items after the visit. I have a bump on my inner thigh that is also on the rash, it is about the size of a dime, and is red. It doesn't hurt or itch. But, it is rock hard and goes deep under the skin and it feels like a round, hard, ball. My doctor said it was a pimple? or a boil? And he gave me a sample of BenzaClin (an acne medicine) to put on it. It concerns me that he basically assumed it was a pimple. The other thing that concerns me is I have tried many different over=the-counter creams (lotrimin etc.) on the rash which have not worked. Will a prescription cream be that much better? The rash has also given my skin blisters from the itchiness. Will they leave scars? Should I take anything to make the healing process better?

Also, about 6 months ago I first saw my doctor and he prescribed an anti-itch and told me to use otc creams. Between then and now I've tried them all to no prevail, why would he prescribe me a prescription anti itch and non-prescription cream? Shouldnt the cream have been prescription? the rash was severe then too.

[Dr_Aparna]

Hi,
Rash on the inner thigh is commonly caused by fungal infections.Tinea cruris is the scientific name for fungal infection of the groin region.As the common name for this condition implies, it causes itching or a burning sensation in the groin area, thigh skin folds, or anus.
Tinea cruris is best treated with antifungal drugs applied topically. Traditionally creams containing tolnaftate, clotrimazole or miconazole have been used, although newer agents such as butenafine are also used.
To cure the infection naturally, keep moist and warm areas of the body clean and dry. Change anything the fungus comes into contact with daily, like undergarments and towels. You can use talcum powder to help keep the area dry. Powders with menthol or zinc oxide may be used, like Gold Bond medicated powder, to soothe the itch.
ref:http://en.wikipedia.org/wiki/Jock_itch
The lesion on the thigh could be folliculitis or a sebaceous cyst.You can apply anti-bacterial cream like mupirocin on it for a week. If it is not resolvinsg then maybe you need to check with your doctor again.For the itching you could take anti-histamines till the rash settles down.