The calf area is necessary to have muscles, if there are no muscles here, then the body will not be able to stand upright and walk properly. If the patient refers to the calf muscles are more obvious, then there are several possible reasons for this: 1. Maybe the patient’s muscles here are relatively well developed themselves. There are many patients due to previous excessive exercise, or due to congenital developmental factors, resulting in the calf part of the muscle is very well-developed, then the appearance will look more obvious lines. 2, may be due to the patient is too thin, there are many patients, especially young women, in too thin, the body surface of some muscular signs, that is, the muscle surface lines, will become very obvious. 3, there may also be Postural factors, for example, there are many patients who are used to tiptoeing on their heels during walking, or whose heels rarely land on the ground, will cause the muscle lines of the calves to become more pronounced. In addition, many patients wear very high heels, which can also cause the calf muscles to look more obvious in appearance.