“…Although the lesions are usually self-limiting, residual lesions may still occur in some cases, such as telangiectasia, residual fibers or fatty tissue, atrophy, discoloration, anatomical deformation, or hair loss. 7,8 These residual lesions are permanent and will not subside spontaneously, representing aesthetic and social problems, so surgery is often required. 9 It is reported that more than half of superficial IH will have permanent Sequelae after involution, and thickness seems to be the main influencing factor.…”