They can emerge when training demand exceeds what a tissue or movement system can currently tolerate. The painful area still needs to be assessed, along with the joints above and below it and the recent changes in mileage, pace, terrain, strength work, sleep, and recovery.
Devon holds a Certified Strength and Conditioning Specialist (CSCS) designation in addition to his Doctor of Chiropractic. That matters because a running plan has to respect mileage, pace, terrain, strength capacity, and the point in your training cycle where the pain showed up.
Rest alone rarely fixes it. It lets the pain settle, but the tissue doesn't get stronger, so the same mileage finds the same weak link. You leave the first visit with a working diagnosis and a plan to rebuild it, and you keep running where it's safe.