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).
Some shampoos cause a tingling sensation. Scalp tingling may occur as a result of an allergy to a hair product. Some people might also experience scalp tingling from excessive scalp picking and scratching. People who experience regular migraines often complain of a tingling scalp.