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.
Sunburn is condition that occurs to skin that has been overexposed to the sun's ultraviolet (UV) rays. Too much time in the sun without protection can result in heightened sensitivity, redness, pain, and even blisters. The best advice regarding sunburn is to avoid it in the first place whenever possible.