I have been having pain in my left collarbone, left side of my neck and a little under my left breast. It started last night and went away but returned again today about 4 hours ago. It is worse when I take a deep breath. and is above my lungs. It is not in the center of my chest and my left arm does not hurt. There is no pain in my jaw. I have recently been working out, lifting small 5 pounds weights and hiking 3 miles daily for the last month. I am 53 year old female. 100 pounds.
Pain like that can have many reasons behind that. A better diagnosis could be made with an ultrasound, so I would suggest you to go for a USG and a mammogram for your diagnosis.- Chat Doctor.