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.
The Diamond Sutra is the world's oldest Printed Book. 1  Gunpowder, paper, printing, and the compass are sometimes called the Four Great Inventions of Ancient China. 2  Kites were first used as a way for the army to signal warnings. 3  Umbrellas were invented for protection from the sun as well as the rain. Gunpowder, paper, printing, and the compass are sometimes called the Four Great Inventions of Ancient China. 2  Kites were first used as a way for the army to signal warnings. 3  Umbrellas were invented for protection from the sun as well as the rain. 4  Chinese doctors knew about certain herbs to help sick people.