Dry red circles on skin

Hi, welcome to the ehealth forum and I am glad to help you.
You seem to be concerned what could the dry red circles with little itching on your face, neck, back and thighs could be.
There are a variety of possibilities for the skin lesions that you have described including nummular eczema, tinea corporis etc. but the definitive diagnosis is not possible online for which you must see your dermatologist. Most cases of Tinea or ringworm are treated by application of topical antifungal creams to the skin, but in extensive or difficult to treat cases systemic treatment with oral medication may be required.
Hope this helps. Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional.