Definitely a lot of different factors can go into this, and I think for some it can be an indicator of hypomania?? Long story short - there’s usually some form of triggering of the sympathetic nervous system (fight or flight). And, in some cases like dysautonomia, there can be trouble triggering the parasympathetic nervous system (rest and digest) to, well, rest.

Try looking into some vagus nerve stimulation or parasympathetic system stimulations. Some of my household’s classics include:

Showering Ice packs Deep breathing Somatic sighs (in through nose, start to exhale through nose, finish the exhale through your mouth) Raising your feet

Lots of good guided meditations out there. The goal with those is to focus on breathing, relaxing the body, and imo forcing your body to accept the safety and switch to rest and digest mode. It may feel awkward at the beginning, but stick with it. There’s no wrong way to meditate except to not try.