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).
Sores on scalp causes. Sores on scalp appear due to different reasons. Stress is one of those causes. Anxiety is believed to cause a number of physical and chemical changes in the body. It is thus possible to say stress could lead to physical symptoms such as dry mouth, sweaty palms, sore on body and pain.