Our expert says:
Hi runner G
I'm not entirely sure what you mean by pain like asthma in the chest and jaw bone - asthma would refer to being out of breath and struggling to get in enough air, and I am not exactly sure that is the same as one would feel in the jaw. If it is a sharp pain that you are feeling, then it might be something quite different, though I must confess to not having any ideas right away what this could be caused by. It's not as though the mornings are particularly cold, although perhaps much cooler than in the afternoons - often cold air is more difficult to breathe in (again, this is the asthma, but not the jaw pain) and so it might explain some of it. If it is a sharp pain in the chest, then I do suggest that you see a doctor - in fact, being breathless when you are not usually is also perhaps a good time to see a doctor and just make sure that things are OK.
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