Citron is pungent, sour, slightly bitter, warm in nature, and belongs to the liver, spleen, lung and stomach meridians, and is effective in relieving liver stagnation, regulating qi and relieving cough and phlegm. If it is used for the treatment of the swelling and pain in both sides of the ribs caused by liver stagnation and qi stagnation, it can generally be taken in boiled water with Buddha’s hand and aromatic herb, which has the effect of relieving liver stagnation. If the spleen and stomach qi stagnation is caused by bloating, pain and discomfort in the stomach and epigastric region, accompanied by belching, swallowing acid, eating less, nausea and vomiting, you can usually boil water with herbs such as Huo Xiang and Sha Ren to drink to regulate qi and broaden the middle. If you see cough, phlegm is more, the color of phlegm is white, accompanied by loss of appetite, stomach and epigastric fullness, discomfort, loose stools, you can and Poria a piece of water to drink, play a role in strengthening the spleen, phlegm, cough.