The blackening of the face after recovery from hyperthyroidism may be caused by physiological blackening, impaired liver and kidney functions, etc. When dealing with this, you need to stay away from the causative factors as soon as possible and carry out general treatment, medication and other means. 1. Physiological blackening: for example, during the treatment of hyperthyroidism, long-term exposure to ultraviolet rays and prolonged exposure to the sun will lead to blackening of the skin, which has nothing to do with hyperthyroidism and the use of medication, and does not require any special treatment. After improving the environment in a timely manner, the color of the skin will gradually become lighter. 2. Impaired liver and kidney function: some hyperthyroidism patients have serious conditions, which may involve the liver and kidneys, resulting in impaired function, which may cause darkening of the face. You should follow the doctor’s instructions to take medication for the lesions. If the darkening of the face after recovery from hyperthyroidism is caused by the above factors, symptomatic treatment is needed, and the specific medication program should be carried out under the guidance of a professional physician.