Hi. Thanks for your query and an elucidate history. Well, as per your history my clinical diagnosis is you have a lump embedded into the muscles of the chest wall, hence the pain and the increasing factors as you have mentioned. I would advise such a patient to undergo ultrasonography or preferably CT scan so that the cause can be determined. On clinical suspicion the lump can be subjected to FNAC- fine needle aspiration cytology to determine what type of lump is this. CT scan will help to know the depth. According to the results of these investigation a decision can be taken whether to treat this with antibiotics and anti-inflammatory medicines OR to go for surgical removal.. So Medical field is an evidence-based science and knowing the correct diagnosis is the best way to see and decide the treatment .