Hair frizz is a common problem that can occur when straightening hair. It is caused by a number of factors, including the type of hair, the heat of the straightener, and the humidity of the air. When hair is straightened, the heat from the straightener causes the hair shaft to expand. This expansion can cause the cuticle, or outer layer of the hair, to become damaged. The damaged cuticle allows moisture to escape from the hair, which can lead to frizz.
There are a number of things that can be done to reduce frizz when straightening hair. These include: