Scar softening injection is not a specific injection, but a local hormone injection, i.e. steroid hormone injection, which inhibits fibroblast proliferation and collagen synthesis within the scar, allowing collagen fibers to be arranged in order and promoting collagen nodule metabolism, thus achieving the effect of making scars softer and flatter. Scar removal by injection is suitable for hyperplastic scars and scars with obvious results. This is due to the effect of the drug itself, or excessive injection dose, incorrect method, different individual sensitivity of patients, etc. Local or systemic side effects may occur after using the drug, such as local capillary dilation, pigmentation or loss of pigmentation, mild local skin depression, menstrual disorders in women, etc. After the scar softening injection, it usually takes 3 days to use topical scar removal medication, and it is also necessary to strictly follow the medical advice and not to stop the medication at will, otherwise the symptoms of scars may be aggravated. In addition, the injection is not recommended for people who are originally scarred. After the wound is healed, the surface scar will be persistently enlarged, which will not only affect the appearance, but also have local pain and even affect sports. If you want to get rid of scars by injection, you must go to a regular medical institution to receive injection treatment in order to ensure maximum safety and effect. In addition, due to the overdose of injectable drugs or the patient is too sensitive, resulting in the depression of the scar area, there is also the infection caused by the poor local resistance. And repeated application may lead to systemic side effects such as obesity, water and sodium retention, and kidney function damage.