Moved from this thread I have just realised I have restless legs syndrome. I had had the vague idea that RLS involved legs spasming and so thought it was different to what I have. Normally, with just me to see my moving legs, I didn't think about it much. But I was driving my daughter crazy with my feet and ankles constantly moving while on the sofa watching tv, so I googled it. My understanding of it now is that the moving of the lower legs is a sub-conscious and conscious reaction to the uncomfortable feeling. For me, it's a sort of swollen ache that feels better when my ankles and toes are flexing and when there's the tactile distraction of rubbing the foot against a sheet or against the other foot. I'm thinking now that this is a milder version of the bone crushing feeling I get in my lower legs and hands when in PEM. I have read that one cause is small fibre neuropathy, which perhaps makes sense.