I'm asking this for a friend. On our ride today, right around the 20 mile mark, she said part of her left calf, on the outside just below the knee, felt like it was on fire. She said it had happened on the last two rides, always around 20 miles. It was better by the time we hit 30, but was still there.
She said one of her tennis partners has the same thing going on, to a lesser degree.
She doesn't want to go to a doctor right away because she doesn't want anything labeled a "pre-existing" condition right now.
Any thoughts?