There is no simplest way to determine the edema of the calf, and the initial judgment is often made by observing the skin texture and color, pressing the depression and rebound. 1. Observation: mainly through direct visual observation of the calf, if the calf skin texture becomes taut, the skin has a bright phenomenon, generally indicates that there is edema of the calf. 2. Pressing: You can use your fingertips to press the local skin of the calf. If the calf area is edematous, after pressing the skin, there will often be obvious depressions, and the depressions will not be able to spring back in time. If there is a slight depression and timely rebound after pressing, or there is no obvious depression, it means that there is no edema. Although it is possible to determine whether there is edema in the calf by observation and pressure, it is not possible to identify the cause of edema in the calf, so it is necessary to go to the hospital and cooperate with the doctor to check in order to make a clear diagnosis.