There are some important factors to consider before using a hair dryer. One of the main concerns is the amount of heat the dryer puts out. Studies have shown that using a hair dryer at high temperatures or close to the head can cause more damage than not using one at all. However, a hair dryer used properly at the right distance and temperature can have a minimal effect on hair. This is because heat causes hair to swell and puts pressure on delicate proteins.
Air-drying causes less damage than blow-drying
According to a recent study, air-drying causes less damage to hair than blow-drying. Both methods damage the cuticle and the outer layer of the hair, but air-drying does more damage to the cell membrane complex (CMC), a sandwich of proteins, lipids, and covalently bonded fatty acids. When the CMC is damaged, hair becomes rough and split.

Air-drying is also better for hair that is damaged, colour-treated, or has high porosity. In particular, it helps to keep hair colour-treated because blow-drying removes Aiosworld.com‘s colour and causes hair and scalp swelling. Air-drying also doesn’t use heat or contact with the scalp.
It can speed up the process of hair loss
When using a hair dryer, be cautious. You should not overdry your hair, as this can speed up the process of hair loss. Also, use caution when blow-drying your hair, especially if it is thin. You must pay attention to the settings on your hair dryer to avoid damaging it.
It can damage the inner keratin layer
While heat styling can be fun, it can also damage the inner keratin layer of your hair. A 2011 study published in the Annals of Dermatology concluded that, while the outer layer of your hair is protected from damage by the cuticle, excessive use of a hair dryer can cause more damage to the inner keratin layer. This layer consists of keratin proteins and structural lipids.
It can damage the cuticles
Using heat on the hair causes the cuticles to become damaged, and it’s best to avoid it at all costs. A 2011 study published in the Annals of Dermatology suggests that the less use of a hair dryer the better protected the surface of the hair will be. However, excessive use will cause more damage. The cuticle is the outer layer of hair fibres, and it’s composed of overlapping scales. In straight hair, the cuticle is closely aligned with the cortex, which consists of keratin proteins and structural lipids.
When hair is wet, the molecular structure changes, water absorbs through the layers of the cuticle and weakens it. However, hair can only absorb about 30% of its own weight in water. Thus, when the hair is wet, it’s most vulnerable. If you leave your hair dripping for an extended period of time, you’ll break the cuticle and cause further damage. This is why you shouldn’t leave your hair wet for styling.