Often when I am hypomanic/manic I just don't feel the need for sleep and happily keep myself occupied until I go to bed and get 1-4 hours sleep. I love this in many ways as I can get so much more done. No so much when I am manic. There have been times when the PTSD was really bad and I suffered severe insomnia. This was horrible to say the least. I was desperate for sleep but could not get more than a few very broken hours a day.

As to what to do I guess that depends on whether it is being an issue or not. Take care