Growth lines, also known as expansion lines, generally do not disappear on their own, but can be reduced or eliminated through medication and physical therapy. Expansion lines are caused by excessive stretching of the skin dermal tissue damage, so that the skin appears concave atrophy, resulting in the appearance of expansion lines, its pathogenesis is not clear, mainly skin pulling theory and hormonal changes in the theory, most of them will continue to exist, and generally will not affect the health of the body, if there is a need for cosmetic treatment can be used drugs or physical therapy. 1. Pharmacological treatment: Early swelling lines can use retinoic acid, chemical peeling agents (such as glycolic acid, trichloroacetic acid, etc.) to change the appearance, but also intradermal injection of plasma concentrates containing a variety of growth factors and proteins, to stimulate the extracellular matrix to induce the synthesis of new collagen, which can increase the elasticity of the skin. 2. Physical therapy: laser treatment, radiofrequency treatment, intense pulsed light treatment, mechanical peeling treatment, micro-needle treatment and other ways of treatment, but there may be erythema, edema, mild pain and other adverse reactions, the general adverse reactions in a short period of time in the natural relief. Expansion lines generally do not disappear on their own, if you have cosmetic needs, it is recommended to go to a regular hospital, under the guidance of a professional doctor for treatment.