Aaaahhhh! How to stop leg from "twitching"?

[Hovis_and_SidsMum]

I've been doing a fair bit of work recently on getting Hovis to keep a nice steady pace whilst I'm in jumping position (he was seeming to get worried when my weight came out of the saddle and speed up). As a result i've been riding with jumping length stirrups.
Last night I was working on halt to trot transition and getting a really nice square halt so i dropped my stirrups back to normal length and discovered my right leg has a mind of its own......
In fairness it has been pointed out before but last night it was horrific. It's almost "ticking" like a hand of a clock against his side and I can't stop it! Its far far worse in rising trot not so bad in sitting. It must feel like i'm nagging him constantly but no matter what my brain told my leg to do it seemed to be ingorning it!
Any suggestions on how to stop it other than amputation gratefully received!

 

[teabiscuit]

shorten your stirrups again? i would

 

[Darkly_Dreaming_Dex]

Have you seen a physio? I get sciatica and that causes muscle spasms and involuntary nerve twitches.

 

[Hovis_and_SidsMum]

I've got two badly damaged discs in my back on the right hand side so that might be something to do with it but my back wasn't hurting or anything?

 

[Samcook]

Might sound like an odd question, but does it do it in bed too? Mine does it while riding but also when i'm laid in bed. i was told it was restless leg syndrome. Drives me MAD!

 

[dwi]

It might not help if you have a physical problem in your leg but my instructor has just got me riding with symmetry straps because I have a tendency to swing my leg backwards in transitions. It hold your stirrup in place next to your girth. APparently if I ride like that for several weeks it will create muscle memory in my legs and they should stay like that naturally