I don't know if anything can top "seizure" or "tic," but maybe **"spasm"** could be it.

Shiver?

Unfortunately not! I’ve had those before and they are less violent and sudden, feel different as well.

tremor, maybe?

Unfortunately not! I’ve had those before and they are less violent and sudden, feel different as well.

Shudder

!this

Unfortunately not! I’ve had those before and they are less violent and sudden, feel different as well.

It's not a tremor or convulsion?

Both are accurate, although opposites. Tremors are small whereas convulsions are seizure level. I’ve experienced similar to both but it’s unlikely I have two separate conditions! The conditions listed in my second edit include both of these, so I believe those are more of what I’m looking for. Thank you, though!

No worries! 🙃What you're looking for is just stumping the heck out of me so I was tossing whatever I could think of because I'm really interested to find out what the word is. Haha.

Stumping me too, haha. As I said in my edit, I hope to find out soon with the help of my doctor!

shudder

Unfortunately not! I’ve had those before and they are less violent and sudden, feel different as well.

Tremor

Muscle spasm

Palsy.

Thankfully not, but thank you!

Shiver or shudder

Unfortunately not! I’ve had those before and they are less violent and sudden, feel different as well.

“got the chills” / “got chills”

It’s not violent/sudden enough, but good thinking.

Flail; spasm; tremble. In descending order of severity.

Tics, sometimes "nervous tics".

Might be, thanks. Check my edit!

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Spasticity

Sounds similar but not quite, thank you for your suggestion!

Seizure

Haha, no. Gladly not!

Frisson perhaps?

An essential tremor?

Tetanus or tremor or even tremulous are good medical terms.

My daughter does this in the cold. Choreathetosis and sensory integration disorder. But it also sounds a little bit like turrets syndrome.

Those actually sound incredibly similar to what I have. ☹️ I do believe if I had tics it would simply be the motor one, though. Thank you so much for these! I’ll definitely ask my doctor as I have an appointment soon enough inshallah. I wish the best for you and your daughter. 💛

Thank you. I wish the best for you too! I’m glad you’re going to the doctor. Hopefully it will help you figure everything out.

Myoclonic jerks or tardive dyskinesia

"Shudder" - as in "A shudder went up her spine as the cold breeze washed over her back." You could also use "Jitter" or "Fit" or "Spasm"

Sounds like calcium deficiency or an orgasm.

DID YOU MEAN A SPASM?? 😭😭

Ataxia

Involuntary Stimuli

My mom told me it was someone walking over my grave.