Chengshan point is on the calf. There is a weizhong point in the center of the transverse stripes on the inner side of the knee. Draw a straight line from Weizhong point to the bulge of the lateral malleolus at the center of the posterior leg. 2 cm down from the center of this line is Chengshan Cave. However, in fact, when the calf cramps, it is impossible to find the right acupoints. Therefore, in an emergency, press the center of the calf with four fingers together. In this way, you can probably grasp the acupoints. In the process of grasping, Chengshan point can be moderately stimulated, and the calf will get better. Also, Weizhong point, Yanglingquan and other points also have an impact on calf cramps. Leg cramps are common symptoms caused by fatigue or cold, and sometimes caused by diabetes or spinal cord diseases. When you have recurrent leg cramps, you'd better go to the hospital for treatment.