You should not bleach your hair more than three times in the same day in general, depending on the thickness of your hair and the health condition. The process of bleaching will erode the protein structure in the hair core. The core loses its support and elasticity, which can lead to hair breakage in severe cases. Therefore, it is not recommended to do the coloring at home because if the time and amount are not properly controlled, the damage brought to hair is irreversible.