Stressful gray hair is more difficult to turn black. If you want gray hair to become black hair is more difficult, daily life to avoid staying up all night, if necessary, you can through the hair coloring to quickly make gray hair to black hair. It is also important to relieve mental tension to avoid excessive stress, which can cause gray hair to continue to appear. Because stress and nervousness can cause the scalp to become too tight and not be nourished to make gray hair appear, so try to keep your mood happy and relaxed. Finally, you should also pay attention to more exercise in your daily life, which can promote blood circulation, thus speeding up the metabolism to reduce the appearance of gray hair. If you have any medical needs, please go to the nearest regular medical institution as soon as possible to avoid delaying your condition, and follow the doctor’s instructions for medication and treatment.