I woke up with a pain under by left breast,that hurts when i take a deep breath. I had a massage this weekend on Saturday, and she did lot of work on my back, particularly my upper left shoulder area. Is there any connection? Some say it may be related to exercise but I did not go to they gym tho weekend,so I worry that a it can be something more serious. I am a 60 year old woman and healthy weight, no medications.
To check the seriousness of your problem just stretch your hand out stretch for the same side keeping hand above shoulder level and if it does not pain then don't worry.  But if you feel tenderness more over the beast region even after 2days then I suggest to visit your gynecologist doctor once.  And exercise or massage on back can not cause this kind of pain. but do check once with cardiologist too if there is a breathing difficulty or pain in chest deep. Hope you have got your answer.  Take care