What type of hair treatment is commonly discouraged for colored hair due to potential damage?

Heat styling is commonly discouraged for colored hair because it can lead to further damage, particularly when hair has already been compromised by the coloring process. Chemical treatments like hair color can make the hair more porous and susceptible to drying out. When heat is applied, it can exacerbate this dryness, leading to brittleness, breakage, and loss of color vibrancy.

While deep conditioning treatments are typically beneficial and help to restore moisture, color touch-ups are a necessary part of maintaining the look of colored hair, and trimming split ends is essential for overall hair health. Heat styling, however, can counteract the benefits of previous care and treatments, making it critical to limit its use or apply protective products designed for colored hair whenever styling is necessary.