I had a similar scare after spending a full afternoon planting and pruning—one vein on my hand popped out and felt sore. I panicked a bit, but my doc said to watch for redness, warmth, swelling that spreads, or persistent pain. For a clear guide on what to look for early, this helped me a lot: early stage blood clot in hand vein .Catching it early made all the difference and spared me from unnecessary worry.