I love hiking/backpacking. Plans are to hike sobo next month with a great friend which is a 2x nobo thru-hiker. Anyway, as I was walking my 12miles (no pack) yesterday my left arms started tingling, hands swelling too. We stop to take a break as I was sitting there my arm stop tingling ,after I started walking again it started back tingling. I had this on the trail once before but I was thinking my pack strap was cutting the flow off to my arm ( I did adjust it), but after walking without a pack yesterday got my thinking. Anyway we took off to the VA hospital to get checked out. I had blood work, EKG which all checked out great, got a stress test to do next wk.Has anyone had any of this before? The funny think about it is I was on the treadmill the day before for 45 mins with no problem. Thanks HS