Too much sebum/ scalp grease.

Alright, thank you all for any help. I'll get in touch with her.

A little update: Nothing has really changed. I went to the doctor and they did some blood tests and gave me an anti-fungal pill prescription. Dr said he didn't see anything that looked like fungus on my scalp but to try it anyway. All my blood tests came back negative for everything they were looking for so they have no idea. Basically told me to try the pill and come back if nothing changes. 
I took my last pill yesterday and nothing has changed. I'm going to give it a couple more washes and see what my scalp does before I make another appointment.

@daiana-nathalie Thank you.

give vickis prototype  she made for oily hair a try and see how that helps

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My new book Ban The Taboo Vol 1

Try rinsing well with water in the shower each day, does wonders, cleared up my dandruff and everything.

At the beginning I was afraid it would be bad for the dreads but they actually really like getting soaked with water on a daily basis, it helps them dread up better.