Horrible odour from testicles and groin.

No matter how many (2 to 3) times I bath a day my body odour can be identified by a distance of around 30 metres from me. I am a student of m tech in iit Kharagpur in power electronics department and we have a very large machine lab and when I enter the lab then within a minute almost every one present there can smell my presence. Some of them use hanky on their mouth to get rid of my smell and this is the instant I fell that I must leave the course and go to somewhere where no one is present. I always sit at last bench in my class room then also the teacher himself near black board start sneezing and students too. No one sits besides me . I am very much frustrated but at the same time I don't let others know that what is going on in my mind. I can't concentrate on my studies not for a single minute thinking of my problem every time. I have gone to AIIMS Delhi but no results.please sir/madam help me to get rid of this body odour.thank you in advance.