The scar hyperplasia period after canthotomy is about half a year. No matter through external medicine or surgery, it can only achieve the effect of inhibiting, softening and improving the scar, so that the scar becomes no longer obvious, but the scar will not disappear. Scars reach maturity about half a year after operation, and will shrink and fade after half a year. For people with scar constitution, the period of scar hyperplasia will be appropriately extended.