How To Cure Body Itch After Shower?

Hi, I am a 29 year old. Every time after a bath, I get itching sensation on my body. I bathe twice a day. I have tried different soaps as well as hot/cold water. However, the itching sensation continues for almost 15-20 minutes post the bath with temporary rashes on the back. I am a non-vegetarian and occassional drinker. Can you help me with this problem.