More than likely you have "fascial herniation" (fash-ee-al her-knee-a-shun) syndrome. These are weak points in the muscle covering allowing tissue to push through---like a bubble on a tire. This will not progress for the better over time.
This covering over your muscles called fascia-it is a type of connective tissue that encases your muscle bellies. As the muscles engorge with blood secondary to work (like running) these little "weak spots" give way to the increased pressure inside the muscular compartment. You get to see your shin bumps.
The prognosis is really dependant on you-Ortho can sew them up, you can leave them alone (they may eventually widen and tear-even to the point of "connecting the dots"
) OR you can decrease your activity level and lead a normal (albeit a little more restrictive) life.
Not uncommon for people to develop ONE of these weak spots after years of running---but if you have multiple weak points, you may want to see a specialist to make certain you have no underlying connective tissue disorder.
You may think this sounds like a drastic step, but I would gladly send 10 guys to get checked for a "maybe" and have them all come back clear...then not send one that was "suspect", and miss something potentially important.
Good luck...
Eagle