Hair Smoothening Side Effects While straight hair is often associated with beauty and manageability, there are some lesser-known side effects and potential drawbacks that individuals with straightened hair may experience. One prominent concern is the damage caused by the various chemical and heat-based processes used to achieve straightness. Chemical straightening treatments, such as relaxers or perms, can alter the hair's structure, making it more susceptible to breakage and split ends. Additionally, frequent use of flat irons and hot styling tools to maintain straight hair can lead to dryness, dullness, and weakened strands. The excessive heat applied during these styling sessions can strip the hair of its natural moisture, resulting in brittle and fragile hair.