Knee spasms while sleeping,jumps then wakes me up.

[Rgsteg]

When I am relaxing,dozing off---bam my knee jumps and hurts.

[Hikoi]

Check out restless leg symptoms. Sounds like it could be that.

[Rgsteg in reply to Hikoi]

I do have that also.But other just started after total knee replacement.

[cabbagecottage]

Myoclonic jerks