Currently, two major perforating diseases include reactive perforating collagenosis and elastosis perforans serpiginosa. In some literature, acquired perforating dermatosis is a third major group and is a catch-all term for cases of perforating disease arising in adults, usually associated with a systemic disease. Kyrle disease is characterised by the formation of large papules with central keratin plugs and is often associated with hepatic, renal or diabetic disorders.
Other glow products contain a small glass vial inside the plastic tube that contains a mixture of hydrogen peroxide in phthalic ester (a substance that is added to plastics to increase flexibility, durability and transparency). Outside of the glass vial is another chemical called phenyl oxalate ester.
When the plastic stick is bent, the fragile wall of the smaller container breaks and the 2 chemicals mix, producing light which makes the stick glow. Glow sticks are popularly used during parties, night parades, concerts and festivals. Glow sticks are also useful in places that do not have a power source and they are regularly used by campers, divers and military personal. Another application for glow sticks is in places that have been struck by disasters like tsunamis, earthquakes or tornadoes. These places pose the danger of gas leaks and since glow sticks do not produce sparks, they are safe to use in such situations.