For the past month I've had intermittent mild pain under in my left armpit. "Pain" isn't exactly the right word, because it doesn't exactly hurt. It more feels like the area just needs to be stretched. Some days I hardly notice it, and some days it bothers me at 10-15 minute intervals. I've had on and off tendinitis in the same area, mostly radiating from the elbow to the wrist, and this too has been flaring up lately. Could they be related?
Yes, I think they are related as nerve supply under armpit, and from elbow to wrist, arises from group of nerves called Brachial Plexus.
Any nerve injury or vitamin deficiency could cause similar symptoms.
You should meet physician to evaluate your condition and if required neurologist.
Hope this helps you.
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