Human Body Systems: Enzymes, Electrolytes & Metabolism

Body systems rely on a balance of electrolytes, enzymes, and hormones like cortisol. Understand fat metabolism, urinary output, and energy system functions.

Man with bedhead trying to cover his hair with hand

What Are the Causes of a Sensitive & Painful Scalp?

Published Aug,14 2017 | By Dr. Ann M. Hester

Scalp pain and sensitivity occur for a variety reasons, ranging from common skin conditions and infections, to the physical irritation from scratching or harsh chemicals. Disorders affecting the nerves and blood vessels can also cause scalp tenderness and sensitivity.