Simple liver cysts are a common occurrence, and with the increase in the number of medical checkups, many people find cysts, or water bubbles, on their liver when they have an ultrasound. More or less, large or small. At first, many people are alarmed by the discovery, but it is actually no big deal. Liver cysts grow slowly, and small liver cysts are not very harmful to the body, but when they get bigger they can produce symptoms of pressure and bloating. Small liver cysts do not need special treatment, and large liver cysts can be treated by surgical opening and drainage, or by puncture and anhydrous alcohol injection sclerotherapy. However, in the process of conventional puncture and anhydrous alcohol injection sclerotherapy, the patient often has a lot of pain in the right side of the chest and back and shoulders due to the stimulation of alcohol during the first shot, and some people are even unable to complete the treatment process. The usual method used is to give a pain shot, such as Dulcolax or something like that, before the treatment, and then a local anesthetic at the skin of the puncture. It is a little better, but the pain is still noticeable. Because the conventionally applied local anesthesia method is only local anesthetic on the skin of the puncture site and the abdominal wall, and there is no way to stimulate the liver peritoneum by alcohol. Recently, we have found a good way to anesthetize the peritoneum as well by puzzling over it, so that it is less painful when punctured with alcohol. How is it done? The previous practice was to start with a local anesthetic – lidocaine – on the skin and abdominal wall at the time of puncture, then puncture to draw water from the cyst, and after the water is dried up, we will directly inject anhydrous alcohol, draw it out after 3-5 minutes, and then inject anhydrous alcohol, repeatedly 2-3 times. Now our practice is different from before, we have made improvements, we put local anesthetics on the skin and abdominal wall, and when we puncture and draw the water inside the cyst, we do not draw it all, but leave a small part of it, then we inject local anesthetics – lidocaine into the cyst cavity again, through the surface penetration effect of anesthetics, so that the liver on the surface of the cyst Through the surface penetration of the anesthetic, the nerve endings on the surface of the cyst are blocked to produce anesthesia and pain relief, and after 3-5 minutes, the water and anesthetic inside the cyst are drained and then anhydrous alcohol is administered, so that the patient does not have the severe pain caused by the conventional treatment in the past and can tolerate the treatment well. The whole treatment process is simple and safe, and is well tolerated by the patient. However, it is not suitable for patients with severe heart disease and patients with atrioventricular block because of the potential increase in the risk of cardiac block with lidocaine, which should not be generalized when the treatment is giving attention.