Hair porosity + Humidity = Frizz
There are two things that conspire to cause frizz – humidity and porosity. Porous hair, which has a roughed-up texture often caused by heat styling and chemical treatments, can look dull and drab.
Together, these conditions create a dangerous curse for the hair.
The surface of the fiber becomes decreasingly smooth and reflective, so it lacks shine and vitality. Its uneven structure makes it unmanageable and difficult to style. Porosity also leaves hair penetrable to humidity, a main reason for major frizz.