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Due to prolonged use of the creams, the original picture has been altered (attachment removed to protect patient identity) and a clear-cut diagnosis is difficult to establish. Going by the area and some other signs in all likelihood it seems a case of fungal infection. As you have taken medicines for so long and it is likely that resistance to the medicines has occurred. So, will have to prescribe you a different set of medicines. Do exactly as told and you will find relief and benefit. Since a close up examination of the skin is not possible, going by the picture and data submitted by you, it seems a tinea cruris infection. Do not apply or rub soap. The skin is burnt and will not heal if you do so. Use a fresh, washed and cleaned underwear every day, preferably cotton and comfortable fit. Dry the area first completely before putting on clothes. Place the towel in boiling salt water and dry it in the sun. Do this every four days to kill fungus.
Get fasting, post meal blood glucose levels and HbA1c levels tested. If there is a high sugar, then get it corrected as soon as possible. Only then will the skin treatment will be effective. Restrict your intake of milk, cheese, yeast, and bread during the course of the treatment. Exercise regularly and lose some weight. It will help in the treatment.