1, the appearance is different: the skin surface of people with upturned nests presents an upward concave shape, which is a natural shape and usually a normal physiological phenomenon. Droplet-shaped human skin surface presents a downward concave shape, similar to the shape of water droplets, accompanied by edema, inflammation and other abnormal phenomena.

2. The reasons for the formation are different: this form of human upturned nest is usually caused by the natural form of human skin and subcutaneous tissue, which is related to factors such as heredity and age, and usually does not affect health. This form of water droplets is caused by edema, inflammation, cysts and other reasons, which needs our attention.