Why is it swelling now and what can it be?

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1

I'm going to have surgery for my left hand carpal tunnel syndrome over the next few days. It got to the point that my sofa is not felt from the fingers to the shoulder. Now I'm just lying in bed and wanted to watch netflix when I noticed that in the place of the forearm, where about this nerve is my arm starts to wave and that very quickly

Can anyone help me

Ps. I know I should to artzt but I ask only to give me a current picture if I have to worry or not

Ch

Would say that there could have been a thrombosis. This means you should now call the on-call doctor on 116117 and have it judged by this. He may then send you to the hospital.