The number of injections of tretinoin for scar treatment should be decided according to the size and type of scar, in addition, not all scar can take tretinoin injection therapy. In the process of clinical treatment, for the local hyperplasia raised obvious, peripheral infiltration rapid scar tissue, can be used glucocorticoid drug injection therapy (such as tretinoin injection), usually the effect is more obvious, usually every interval of 10-14 days injection, a course of 3-5 times. If you suffer from scarring and need to use Triamcinolone acetonide injection therapy, it is recommended to go to a regular medical institution, should be under the guidance of a specialist physician, according to the type and size of the scar to choose whether to inject and the number of injections.