How to test for glass in hand after cut heals?

I cut my hand with some broken glass two weeks ago. I cleaned it the best I could and pulled one shard of glass out. It’s still tender after two weeks even though it’s mostly healed over. I’m beginning to wonder if there is a small shard left in there.

Aside from cutting it open, is there a way to tell if a shard of glass remains in a healed wound in the palm of the hand?