I am not sure what other symptoms you may have, or what correlation there is to
running, but
when I put tongue
pain into the new Medhelp symptom tracker, the 7 possible causes were: tongue problems, Glossitis, iron deficiency anemia, folate deficiency anemia, Pernicious anemia, Megaloblastic anemia, and Chlorine Poisoning. Most of these are one form or another of anemia. You may want to see your doctor about checking levels in your blood.