A flush valve is a mechanism used to flush a toilet or urinal. The valve and associated hardware are located within the toilet tank or in the body of the urinal. Most toilets have a lever or push button activator, which is used to operate the flush valve.
Photosensitivity (or sun sensitivity) is inflammation of the skin induced by the combination of sunlight and certain medications or substances.This causes redness (erythema) of the skin and may look similar to sunburn.hotosensitivity (or sun sensitivity) is inflammation of the skin induced by the combination of sunlight and certain medications or substances.
Sun-sensitizing drugs (photosensitivity) facts. 1  Many common medications may cause a reaction in some individuals that is similar to sunburn. 2  Symptoms of sun sensitivity are similar to those of sunburn.  The phototoxic reactions may happen within hours of exposure to sun.