Washing your hair every day is the most common mistake stylists encounter. Daily shampooing strips natural oils that keep hair shiny and manageable, forcing your scalp to overproduce sebum in response. Most hair types benefit from washing every two to three days. If your hair feels oily on off days, a light dusting of dry shampoo at the roots absorbs excess oil without the damage cycle of daily detergent exposure.

Applying conditioner from roots to tips is another widespread error. Conditioner is designed for the mid-lengths and ends where hair is oldest and most damaged. Applying it to your scalp weighs down roots, creates a greasy appearance within hours, and can clog follicles over time. Start from your ears down, work the product through with your fingers, and let it sit for the full two to three minutes listed on the bottle rather than rinsing immediately.

Heat styling without a protectant spray is essentially cooking your hair. A single pass of a flat iron at 400 degrees Fahrenheit can vaporize the moisture inside your hair shaft, creating bubbles and fractures in the cortex that no amount of conditioning can repair. Always apply a heat protectant to damp hair before blow drying and again to dry hair before using any hot tool. This creates a thermal barrier that dramatically reduces structural damage.

Brushing wet hair with a regular bristle brush causes breakage because wet hair is 30 percent more elastic and vulnerable to snapping. Use a wide-tooth comb or a specifically designed wet brush, and always start detangling from the ends, working upward in small sections. Starting from the roots and pulling downward compresses tangles into tighter knots and tears through weakened strands that would have separated easily with a gentler bottom-up approach.