 [ Symptoms ] lump in chest hi i am feeling uncomfortable from last one month the few symptoms which i am having are  1 pain in chest 2 lump just under the left chest nipple  it pains when i press it 3 sore throat and 4 fatique i am 17 years and i have consulted few doctors ent and gp is most of them have conducted few tests and say that this is due to acidity and lump is because of puberty and will go away within few months  there is no history of cancer in my family [ Disease ] keep in mind that not all of your symptoms need to be linked to one universal cause fatigue sore throat for a month think mononucleosis your doctor can order a sensitive ebv panel not the less sensitive mono spot test lump in breast in a 17 year old male i assume this is most likely adolescent gynecomastia you can look this up on the internet this is quite common and related to hormones but it may not go away in a few months it can last longer