<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi im a 21 year old female. i recently notice a hard lump under my left collarbone. i went to the doctor and she told me it was a muscle. but it feels swollen. i do press on it alot. is it normal to have an upper uneven chest with muscles even if i dont work out? i also started to press on my right side too and i feel a lump. it feels like a bone. but i dont know. if i keep pressing on my upper chest, is it possible im just causing harmless pain to it. do i have anything to worry about?  <response>: Welcome to Chat Doctor .1. You said that a doctor has examined and said its muscle mass, but you still feel that there is something there. 2. In this case what I would recommend is get a chest x-ray PA view Picogram and ultrasounds scan of the muscle lump area gives us exact content and involving structures3. No uneven muscle without workup is not possible.4. If it is not painful and not causing discomfort - you can ignore.5. If you do have symptoms, get the above-mentioned investigations done - They will help you to conclude and confirm. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. 