The subcutaneous tissue layer is the loose connective and adipose tissue below the skin. The subcutaneous tissue layer is located below the dermis and is a layer of adipose tissue that is about five times thicker than the dermis and has no clear boundary with the dermis, anatomically known as the superficial fascia, and clinically referred to as the honeycomb tissue. Subcutaneous adipose tissue is a layer of relatively loose tissue, it is a natural cushion, can buffer external pressure, at the same time it is also a thermal insulator, can store energy, in addition to fat, subcutaneous adipose tissue is also rich in blood vessels, lymphatic vessels, nerves, sweat glands and hair follicles. The subcutaneous tissue layer can buffer external pressure, can store energy, regulate body temperature function, respiratory function, but also can absorb nutrients from the outside world, in addition, due to the laxity of this layer of tissue, blood vessels are abundant, clinical often do subcutaneous injections in this. Patients with skin discomfort, subcutaneous tissue layer damage in the regular hospital dermatology consultation, do not be negligent, so as not to delay the condition.