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).
Discussions By Condition: Head conditions. Tender to touch top left side of scalp. Hi, it's been about two weeks that the left side of my scalp, near the top of my head, has been feeling very sensitive/tender when touching it. Examples include brushing hair, running fingers through hair or laying on pillow. This pain seemed to have gone away about a few days ago but it has come back today..