Kitty litter that is made from clay or bentonite is slightly radioactive. GK Hart/Vikki Hart, Getty Images Cat litter is sufficiently radioactive that it can set off radiation alerts at international border checkpoints. Actually, it's not all cat litter you need to worry about -- only the stuff made from clay or bentonite.
Deep folliculitis is usually more severe. Follicles are densest on your scalp, and they occur everywhere on your body except your palms, soles, lips and mucous membranes. Damaged follicles are at risk of infection. The most common causes of follicle damage are: Friction from shaving or tight clothing.
Weaves are the biggest problem because they cause traction on the hair and inflammation of the root of the follicle. Tenderness is a sign that there is inflammation and possible infection. Wigs raise the temperature of the scalp, and if there is an underlying problem, it can add to the low-grade bacterial infection.