Frizz Facts Do you know why frizz happens? When you have wavy or curly hair, your strands are likely rough and porous.This irregularity of sorts causes it to absorb the extra moisture. If you use a lot of heat tools, every day, or colour your hair you can damage your cuticle and cause it to frizz. And lastly, friction. When you touch or rub your hair, frizz is likely to happen.