I get this too, but for me it doesn't seem to be part of my PN, it is just that I need some extra B vitamins. My daughter gets this sometimes too, and she doesn't have PN. We just take some Vit B complex for a few days or weeks and it gets better.

Supplementing just one type of B Vit can be problematic, as they are synergistic. If you increase the dose of one vit B, you really need to increase the intake of all the rest otherwise you will cause deficiencies.

hth

raglet