<s>[INST] I have a weltlike  rash on my upper body stomach back breast area they are not itchy the largest is the first one I got on my left side it is a little bigger than a quarter any ideas what it is I have had the first one since last Wednesday and the others since Saturday [/INST] Hi,Nonitchy rash on chest and back may be most probably tine a versicolor. Kindly consult dermatologist for the firm diagnosis and perfect treatment.i would suggest to apply ketoconazole cream and to take ketoconazole tablets for two weeks. As the causative fungus resides on scalp,do shampoo with ketoconazole shampoo daily. I hope this would be helpful. Thanks.Dr. Ilyas Patel MD </s>