Hi.  I have just started running again and I have noticed a discomfort in my lower teeth as I run.  It subsides after my workout ends.  I have had this in the past and it usually improves (even goes away) as I get in better shape.  Is this something to worry about?
HiT hanks for writing in. It could be due to wearing away of enamel. Use desensitizing toothpaste & leave it for 5 min then rinse. If problem further persists then consult dentist. Regards