Hello dear Warm welcome to Healthcaremagic.com I have evaluated your query in details . * There are different possibilities for this issue as - ligament sprain or strain - muscular pull - neurovascular bundle related - internal organ pathology including lung parenchyma , pleura or others . * Should be examined with clinical signs eliciting thoroughly , necessary work up of x-ray chest or others . Hope this will help you surely to understand the issue . Wishing you fine recovery . Feel free to ask any further doubts . Regards .