Nourishing blood, calming nerves, relieving convulsions and moistening skin. Pearl powder is cold, sweet and salty, enters the heart and lungs, and has the effects of calming the heart, calming the nerves, improving eyesight and eliminating haze. It is often used to treat insomnia, dreaminess and clouds. In addition, regular external use of pearl powder can make the skin smooth, delicate and elastic. Precautions are applicable to people with spots on the face, dry skin, insomnia, dreaminess and palpitation. Cold constitution, stomach cold, lithiasis, allergic constitution and pregnant women are taboo. Oxalic acid foods such as spinach should not be eaten together. Eating pearl powder and spinach together is easy to form calcium oxalate and cause stones. How to eat tea: mix pearl powder with honey, brew with boiling water, and drink after cooling. Put a proper amount of pearl powder under your tongue for four or five minutes, and then clean your mouth with warm water.