I know the feeling. Waves are exactly how it is, intense....constant...tiring.

I hope yoga helps, I have found that useful for me in the past. However, sometimes if I know it'll happen (e.g. if I know that self destructive part is just too eager and I'm not overly willing to fight her because I'm not entirely convinced she doesn't actually make a lot of sense........if that sentence makes any sense!)...I will try and use part of my mind that wants to be healthy (even if she can't stop it entirely) to minimise it as much as possible.

Sometimes this can be the form that the self harm takes - one type over another...at others it is having a 'stop' point in mind - this can vary and not always be met but I find having one can, at least sometimes, give me a moment to think and that can be helpful. Sometimes I plan something afterwards, just so I only have a limited time period to do it then bandage it in - I find fear of being 'found out' the best stop sign!

I feel awkward saying these things as they aren't exactly preventative - and those skills that are distractions etc. (like your hiding) are clearly the best line of defence...but sometimes if I know there isn't a hope in hell of not doing it, I'd rather be vaguely conscious enough of what I'm doing - some control at least! Apologies if this isn't helpful! I do understand.

Take care of yourself, as best you can.