Sick Hair

I have a head cold, and it seems like my hair has a cold too! Every time I get a cold, my hair gets dry and crispy. What's up with that?! I've been moisturizing and oiling it, but it doesn't stay moist. I know I'm probably a little dehydrated, but I've been drinking lots of water. I want to wash and condition my hair, but I. have. no. energy. I'm tired from just putting my hair in a bun.

Hopefully, I'll feel well enough to deep condition in the next day or two.