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Why is there a red, itchy rash on my inner thigh?

I'm a 27 year old male with no prior health problems at all. Recently, I noticed a red and pink type rash on my inner thigh. It is scaly, and itches a lot. I try not to itch it, thinking it just makes it worse, but it is hard not to. It has been there for about 3 days now, and it shows no signs of going away. What can be done to cure and get rid of this itchy rash? I have also not changed any of my eating habits either, so I know it is not an allergy. In addition, I am not on any medications.
The most likely cause of this rash would be a local irritant reaction, or contact dermatitis, from an exposure to a new soap, personal care product, or other chemical. So it would be worth thinking about whether you have recently changed your routine or used a new product. Obviously, if so, eliminating the product would be an important part of treatment. You can also treat the rash by keeping the skin clean and dry (as moisture and sweating will irritate it), taking an over the counter antihistamine to relieve itch, and using an topical over the counter steroid cream to reduce the inflammation. If these do not work, you should see your doctor to obtain a formal diagnosis and determine what needs to be done. Other possibilities would include eczema, which is an inflammatory condition of the skin characterized by redness, itching, and dryness. Similarly, fungal infections of the skin in the groin (jock itch) are common. The treatments for these conditions are all slightly different, so it would be best, if simple measures are not working, to talk with your primary care doctor before experimenting with treatments in order to make sure that you are doing the right thing.
This answer is for general informational purposes only and is not a substitute for professional medical advice.
If you think you may have a medical emergency, call your doctor or (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under Zocdoc’s Terms of Service.

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