Hello Mikey,
I am sorry to hear of your discomfort. UTI's tend to have burning pain on urination and skin creases normally are not involved. I am not there so cant state with any certainty what you have, but from what you are writing, I am wondering if you might have a fungal infection in your skin creases. Symptoms of that would be reddened skin that can itch and burn. Most commonly redness such as you describe, is a fungal infection, and mild cases can be treated with an over the counter anti fungal cream. However you would need to see your doctor to make certain that is what you have.
I hope I was able to help,
Sincerely,
Susan
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