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.
Moving on with causes of ingrown hairs and cysts, an extremely painful follicle cyst indicates of there being an infection. An infected cyst can result from various reasons. One of the common ways of getting an infected ingrown hair cyst is through touching, picking, pricking or tweezing using dirty sharp objects.