DIY Remedy - Minimize mark that a blemish may leave by mixing 1/2 teaspoon baking soda and 1/2 teaspoon distilled water to create a paste. Apply to affected area for 5 minutes;splash off. After, use cotton swab to dab on hydrogen peroxide. Prevents darkening. Worth a try!
My great grandmother said that her mother used to do this. When she died she didn't have a gray hair. Teabagging your hair! Blondes: Chamomile; Red: Rooibos; Brunette: Black. Once a week, steep 2 tea bags in 2 cups boiling water for 10 minutes. Let the liquid cool to room temperature. Pour the mixture over wet, just-washed hair, rubbing it through the way you would shampoo. Leave the rinse on for 10 minutes; wash and condition to seal in the silky, glossy results.