Air dry vs blow dry hair: which is better for your hair

Is it better to air dry or blow dry hair? Air dry when you have time. Blow dry on low heat when you do not. Neither is bad.

The main idea is that heat can damage hair if it is too hot and too close. Wet hair is also weaker than dry hair, so rough brushing and long soaks matter as well.

Why air dry wins on gentleness

Air drying uses no heat, so there is nothing to scorch. Hair left to dry also tends to keep its natural shape. That suits curls and waves.

The cost is time. Thick or long hair can take hours. Going to bed with damp hair can leave it tangled and flat in the morning. Wet hair on a cold morning is no fun either.

Why blow drying is fine

A hair dryer is quick and gives you control over the shape. Used well, it is not a big risk. Makers and hairdressers in general suggest:

• Towel dry first, with a squeeze and not a rub.
• Use low or medium heat.
• Keep the dryer a hand's width from your head and keep it moving.
• Stop when hair is mostly dry, not bone dry.
• Use a heat protectant if you style often.

The deciding rule

Ask how your hair feels. If it is dry, split or breaks, cut back on heat. If it is healthy and you are in a hurry, a gentle blow dry will not hurt.

A simple middle path: towel dry, air dry for twenty minutes, then finish with low heat.

The exception

If you have a scalp problem or sore skin, ask a pharmacist or doctor. Heat on an irritated scalp can sting. If you bleach or color often, hair is more fragile, and the case for less heat gets stronger.

For other personal care swaps, see shampoo bar vs bottled shampoo and bar soap vs body wash.