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).
Neurological conditions where the nerves send pain signals when no actual pain is occurring can also lead to sensations of heat, tingling, or stabbing pain in the scalp. Additionally, headaches can be linked with symptoms like pain around the scalp and forehead.