Edema can be determined by visual inspection, such as eyelid swelling, and by palpation, such as depressed swelling in the low-hanging parts of the body. At the same time, depending on the cause of the disease, the characteristics and manifestations of edema vary during visualization and palpation. 1. Cardiogenic edema: palpation is usually the mainstay, and when the low-hanging part of the body is pressed, it is symmetrical, depressed, and slow to return to its normal form. 2. Nephrogenic edema: eyelid and facial edema can be seen with the naked eye on visual examination, and the edema area is floppy and mobile on palpation. 3. Hypothyroid edema: thickening, roughness, and pallor of the skin at the site of edema on visual examination, and decrease of skin temperature on palpation without obvious depression. If edema occurs, it is recommended to go to a regular hospital to avoid delaying the condition.