Certain conditions can cause secondary alopecias. Any surgery on the scalp (neurosurgery, skin lesion surgery), leaves permanent scars where hair follicles are destroyed. Moreover, after certain cosmetic procedures such as facelift, forehead lift or brow lift, a scar could be visible also. Very often trauma or burns leave bad scarring on the hair bearing areas. All these scars, if missing hair, can be restored with hair restoration. Oftentimes, if a scar is too thin and lacks a subcutaneous fat layer important to ensure hair growth, the fat layer is restored first, then hair restoration is performed. Hair regrowth can be at times lower than usual (around 70%), thus requiring a second procedure at times for additional filling.