Scars are a piece of heartache for everyone, and they are very common in our life. Scars are the reaper of face value and make us suffer. Scars can be divided into new scars and old scars according to the length of time, so what are the differences between the two types of scars in terms of repair? And how should they be treated? What is the difference between new scars and old scars? The difference between new scars and old scars lies in their stability. New scars: mainly refers to unstable scars that are still in the tissue recovery period. For example, in the early stage of wound healing, scar tissue is mostly in the proliferation stage. Generally, it can reach the stable stage after 3-6 months, but it may take several years for longer ones, but there are still individual differences in this. For unstable new scars, the incision starts to appear red and hard around 1 month after the injury, and some patients may have raised and painful scars. New scars need to be treated with early intervention; if left untreated early on they can become hyperplastic and raise the surface of the skin, which can also bring about symptoms such as itching and pain. Old scars Old scars are scars that are in a stable stage as opposed to new scars, usually reaching stability after 6-12 months, or in some cases, a year or more. In old scars, the scar tissue gradually tends to mature, the fibroblast and capillary components gradually decrease, and the collagen fibers are arranged in an annual nodular pattern and become arranged in parallel bundles with each other. The metabolism of old scars has been slowed down and stabilized compared to new scars, so if the treatment method used at this time is not appropriate, it will not only fail to remove the scars but may also aggravate them. Therefore, it is important to choose the treatment method carefully. According to the different scar and the cause, the Coal General Hospital Medical Aesthetic Plastic Center three major scar removal techniques: minimally invasive scar removal repair, laser scar removal and non-invasive scar needles. Here we also want to remind the majority of beauty lovers scar treatment should be timely.