chest? i am suffering from gynecomastia for about 10 years.
if i excercise my chest my condition become worst,and i havnt excercised for years since i got to know about the consequences of excercising my chest.
i want to build my upper body and not affect my chest.
if i can do that please answer.

I suffer the same fate my friend. If you work out and do certain excersies like bench pressing with heavy weights, you build up the muscles behind the fat in chest and you will look bigger than you want. The only thing I can tell you is to do certain workouts like miltary press or pushups with alot of reps so you can be defined. DO NOT add more weight to any workout or you'll just get bigger than you are.