Pain under the left rib cage after anger is very common in clinical practice, which is due to the fact that the liver meridian will be affected after intense anger. The liver meridian travels to the location of the liver and gallbladder, which is under the left rib cage. If anger affects the function of the liver, leading to problems with the liver’s detoxification, the pain under the left rib cage will occur, and then the commonly used medication is Chai Hu Shuo Liver Essence. Chai Hu Shuo Liver Essence is a famous Chinese medicine prescription, which includes Chai Hu, Angelica Sinensis, Paeonia lactiflora, Pericarpium Citriodorus and other medicines, which are able to effectively detoxify the liver and regulate the qi, and so the pain under the left rib cage will be relieved significantly after taking Chai Hu Shuo Liver Essence. Other relief methods include pressing some acupoints of the liver meridian, such as Taichong point of the liver meridian, which is located on the back of the foot below the big toe. Pressing Taichong point can effectively dredge the liver and regulate qi, so that the symptoms of left subcostal pain can be relieved.