Infection anywhere in the head can cause sensitive scalp and scalp pain. Even a common cold can cause bouts of scalp pain.

Clean up your dentalware and environment. Lumps on the scalp are often called sebaceous cysts, actu­ally this is where your body has sequestered PCBs (polychlorinated biphenyls, extremely hazardous, now banned in the U.S., but often a pollutant in detergents.) Get rid of them by switching off detergents for all purposes. See Recipes for dishwasher liquid, dishwasher detergent, and laundry detergent replacements.