Knocking on the bile meridian can promote the secretion of bile, therefore it can promote the digestion of fatty foods and the absorption of fat-soluble vitamins, promote intestinal peristalsis and inhibit the growth of intestinal bacteria. It can also make the bile meridian smooth, active qi and blood, increase yang energy, accelerate blood circulation and metabolism, and enhance immunity. In addition, knocking on the gallbladder meridian can also lose weight and thin legs and regulate the abdominal organs and qi. However, if you knock on the gallbladder too often, or too much power, you can also cause the gallbladder meridian fire, causing red eyes, irritability, headache, dystocia, dry mouth, bitter mouth, insomnia, tinnitus, blurred vision, etc., but also can cause the bile excretion is not smooth, induced gallbladder stones, cholecystitis, cholangitis and so on.