Thanks a lot for the quick answer.
Here is the additional information: I am a 33 year old male. The predominant symptom is itching. I would not say pain or burning sensation really, as it is not intense. The urge to scratch and continue scratching is present at night. No other site has such a problem. I have good skin overall. But I have some acne on the back and that is all. No other medical issue. I am in good health. As I had mentioned earlier, I exercise and sweat a lot. This area often feels "sweaty".
Does it look like a fungal infection? The clear symptom is that scaly patch, very clear demarcation between normal and affected skin. At times it may feel like leather and it is one of these "feel good scratch" that just, of course,makes it worse. I have used Lotrimin antifungal spray thinking I knew what it was. Applying the spray does it burn for a bit, but as soon as I stop using the spray I am back to the worse state. Can it be psoriasis or something else? If so would it mean that my body will have more of these patches? In any case, please let me know what you think it is and what you believe is an appropriate treatment. Thank you.