A black forehead from a curling iron may be due to epidermal tissue necrosis or hyperpigmentation during healing. Recovery time varies, epidermal tissue necrosis about half a month to scab off, hyperpigmentation about 2 months to recover. 1. Epidermal necrolysis: Due to the high temperature of the curling iron, the high temperature will cause the skin of the forehead to be scalded, resulting in necrosis of the epidermal tissues, which will appear as black atrophic skin or blisters. Growth factor gel can be applied to promote the healing of epidermal shedding, usually takes half a month to fall off. 2. Hyperpigmentation: Hyperpigmentation may remain when the wound recovers. Hydroquinone cream, vitamin E cream and other treatments can be applied, usually about 2 months to recover. Patients with severe hyperpigmentation can also be treated with carbon dioxide laser to lighten the pigmentation, and it will take about half a year for the scabs and pigmentation to fade away. As each patient’s condition is different, it is recommended that patients seek timely medical treatment and strictly follow the doctor’s instructions.