Their was a lump in my right nipple. i went to doctor but he said its normal in teens and it went away with time. now their is lump in my left nipple.

Depends on the situa: Pubertal gynecomastia will occur in 1/3 to 1/2 of males & generally last about a year before fading.Up to 3 years is noted occasionally before disappearing. Overweight kids can appear to have it from just fat accumulation.If present after 3 years, surgical removal of the glandular tissue & liposuction of any associated fatty tissue will do the job.