Why Do I Smell Bad Even After A Shower?

hi, im a 22 year old male. i'm 6"2 and just under 17 stone. i have recently lost alot of weight but i still have a huge problem. i smell really bad. i am a clean person who showers daily and eat healthy foods and drink lots of water but after i have a shower even sometimes within minutes i smell a bit like poo! i have had the problem for the last year and the smell seems to be getting worse. I keep getting really sweaty especialy around my genitals and anal area. can you please help as its ruining my life.