How can I keep my hair from flaking ?

I have curly hair so I wash it every week to two weeks. I’m getting braids and leaving them in for 2-3 weeks. How can I keep my hair from itching and flaking so fast I swear my scalp starts itching after a couple days. I already use t gel and I’ve tried head and shoulders. Neither keep my scalp fresh for long. (yes I will wash my hair while I have braids but it will make my hair fuzzy faster.)