Hi, I am female, 25 yrs old, 2 days ago I recently noticed an enlarged vein?? or something that runs from under my left ribcage and running up through the middle of my left breast. I can't see any discolor on my skin but can feel it by following it with my fingertips. If I raise my left arm, I can slightly see an outlining of it. It is sore and tender to the touch and when stretching. I can also feel little bumps?? (like it's inflated) along its path. I thought I could massage it away in a few days but seems like it has worsened. Now seems like the vein has grown in diameter giving it a more definitive feel when I trace it with my fingertips. The only thing I could think of that may have caused this is my recent stretching and excercises. Could this be something critical? I currently don't have health insurance and don't have a doctor so any help is much appreciated. Thank you.