Gout causes a painful, swollen joint that's so severe that the weight of bed sheets can cause distress. There may also be more than one joint affected with gout. With gout, uric acid -- a normal chemical in the body -- forms crystals that deposit in the joints, causing inflammation and pain.
China has been the source of many innovations, scientific discoveries and inventions. This includes the Four Great Inventions: papermaking, the compass, gunpowder, and printing (both woodblock and movable type). The list below contains these and other inventions in China attested by archaeology or history.
To make sure that they always had the upper hand, the Chinese invented many simple, yet effective tools of war. The Military inventions of ancient China were the kite, the wheelbarrow, naval mines, land mines, the flamethrower, the early form of mustard gas, the fire lance, paper armor, and the crossbow.