 [ 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 ] i really want to answer this bizarre question but struggle with trying to take your question seriously first you did not cause brain damage from expelling gas unless the force of the fart launched you forward or into the air at great speed see this what i struggle with  a sudden movement of the head or neck can cause a brief spasm of the neck muscles so i suspect this is what happened to you i trust you have fully recovered and that there are no unintentional collateral damage to your physical surroundings