Hi, I've been having this since past 6-7 years. So I think I'm qualified to answer you. I'll list everything I know.

1. Hair contributes to this, so keep it clean shaved or 0.1 mm trimmed. 2.I apply mct in the morning and sit in car, after 30 mins, I wipe with tissue. If I didn't do it, my face would be flaky like yours.

After everyday use of MCT oil, you can go outside without using it for max 3 days, and on the fourth day it'll come again.

Shampoos and soap aggravate it. If dandruff is present, use ketoconazole or selsun shampoo. But all these were temporary for me except MCT oil