Not entirely sure whether this is a Health or a Style & Beauty issue really but I'm so fucked off with my hair and thought I'd see if any of you have ever had anything like this and if you've any advice.
So for the past five years, every six months or so, my hair will suddenly go from healthy and glossy, to a weird 'gluey' texture overnight. It usually lasts about a week and during that time, it doesn't matter how many times I wash my hair, it doesn't get any less weirdly textured. In fact, it seems to make it worse. I can't even pull a brush through it when it is like it. It looks frizzy and feels greasy. When I run my hands through my hair afterwards, my skin feels sticky somehow. If I try to wash it again, it's like the shampoo refuses to foam up.
And then it will go fine again for another 6 months to a year. In fact, I get frequent compliments on how healthy/ long/ thick my hair looks (ironic!)
But it's happening again and I am SO fed up with it. My hair isn't coloured and aside from shampoo and infrequently, conditioner, I don't use any products on it.
What is wrong with me? Help me MN 
It's particularly bad at this time of year when I can't cover my hair with a hat.