One of the main causes of sinus drainage is simply being alive. Every day the human body produces several liters of sinus fluid and mucus, and all of that natural liquid must go somewhere.
It is a area of tenderness of the scalp in which people also sometimes feel stabbing headaches. Others just feel very sore and tender to the touch. It is felt to be caused by irritation of the connective tissue which attaches the muscles of the scalp to the skull (cranium).
Ive always had a tender scalp on and off but about 2 years ago I started noticing my hair was thinning where my scalp was sore primarily. Its been thinning at the top and around the temples.The thinning progressed rather quickly ive had to xut my hair shorter to make it blend.y hair has also started to fall out and at the end of my hair, a white little grain is at the end. Hair will not stop falling out. I have gotten blood tests at a dermatology office and everything was normal. I also have tried about very type of zinc pyrithione shampoo, at the highest concentrations.