Thick raised line under skin on bottom of the foot, starts just before the heel and travels up the inside of my right foot. It's about as thick as a pencil and roughly two inches long. Applying pressure causes only slight discomfort, but a day on my foot will cause an ache. There is nothing visible on the skin surface. Suffered this previously on left foot, but only on the bottom (maybe half an inch) and went away without seeing physician. Saw an MD this weekend, but all they knew was that it was clearly soft tissue, but doesn't act like tendonitis. Any suggestions? I can't find anything online and can't really get into, let alone afford, a podiatrist.