www.4haircare.com.au Chemicals such as Bleach, permanent and semi permanent colors, Perms and Straighteners are all very damaging and actually change the chemical structure of the hair fiber making the hair more susceptible to damage.
Mechanical Damage can be caused from Harsh Brushing, Harsh Combing, Rubbing the hair too harshly with a towel, and Abrasion from rubber bands, barrettes and other accessories.
Just-washed hair is especially susceptible to mechanical damage. Heat from hot blow dryers, rollers, curlers and straightening irons are high offenders of damage. Environmental Damage such as the Sun’s ultraviolet rays, Wind, and Salt water.