Is child-like hyperactivity common in people with BPD?

[Family Court Strategies: When Your Partner Has BPD OR NPD Traits.]

Is it common for BPDs to be very hyperactive at times... like children?

I remember my exUBPD would text me a lot saying "I'm all bouncy today!" but that wouldn't last long...

And on our first country drive (only for 1 hour)... as soon as we got in the car she started bouncing up and down on the seat and told me she can't sit still for long. I said "ok... but we only just took off?" And she said "I know! it's just me. I don't even like driving because I can't sit still in a car for long! I get really fidgety".  And boy was she fidgety.

She kept playing with the music and changing songs after 2 bars in... then she'd look at me and be all smiley like a child. It was really weird how she couldn't sit still. 

I remember once she told me that she oscillates between feeling manic and mediocre. And she definitely could fall into deep sadness sometimes.

She used to be addicted to drugs eg speed and cocaine. And I have a feeling now that she might have even been back on speed, because her eyes would be huge sometimes   

[Diana82]

Is it common for BPDs to be very hyperactive at times... like children?

I remember my exUBPD would text me a lot saying "I'm all bouncy today!" but that wouldn't last long...

And on our first country drive (only for 1 hour)... as soon as we got in the car she started bouncing up and down on the seat and told me she can't sit still for long. I said "ok... but we only just took off?" And she said "I know! it's just me. I don't even like driving because I can't sit still in a car for long! I get really fidgety".  And boy was she fidgety.

She kept playing with the music and changing songs after 2 bars in... then she'd look at me and be all smiley like a child. It was really weird how she couldn't sit still. 

I remember once she told me that she oscillates between feeling manic and mediocre. And she definitely could fall into deep sadness sometimes.

She used to be addicted to drugs eg speed and cocaine. And I have a feeling now that she might have even been back on speed, because her eyes would be huge sometimes   

[HoldingAHurricane]

My dBPDh ADHD and generalised anxiety disorder. Both of those things make it difficult for him to sit still. His therapist has mentioned that ADHD is a common co-diagnosis with BPD. Cocaine and speed are both stimulant medications and stimulants are the type of medication used to treat ADHD.

I quite like the hyperactivity aspect, most of the time. I find it endearing and mildly amusing (in a nice way not condescending way)and he sure gets a lot of the heavy lifting work done, especially when he perseverates  . On the other hand, lack of focus is frustrating and him physically being erratic (darting around, shouting random things out) can be very unnerving. I have learned when I need to take a break and how to communicate my needs around predictability. 

Why she is like that doesn't really change that she is or what impact it had on you though which is something worth reflecting on.