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).
Read More. 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. am a 29 year old female and for the past 6 months my hair is looking rather thin around the crown area. My scalp is very sore & tender around this area and gets to look quite red and hot which you can feel my holding a hand above my head.