By concern · Sub-chapter 03 · Combined
Dryness depletes the cortex from within. Heat damage changes its structure permanently. Two problems, one page — with a shared recovery path at the end.
221 how-to's · Updated 1 May 2026 · Avg. 5 min per piece · Edited by Nelly · Beauty & Style Director
Editor's note
Dryness and heat damage are related but not the same. Dry hair lacks moisture in the cortex — it can be resolved with the right conditioning protocol and a gentler cleansing cadence. Heat damage is structural: the proteins inside the shaft have been denatured, the disulphide bonds disrupted, the cuticle blistered.
Other hair concerns
Dryness
Hair dryness is a cortex moisture deficit. The cuticle determines how well the cortex holds onto water. When those scales are lifted or eroded by alkaline products, mechanical damage, or environmental stress, moisture leaves the shaft faster than it can be replenished.
Signs: rough texture when dry, tangles easily, looks dull, drinks conditioner but stays dry within hours, may frizz in humidity.
Heat Damage
Heat-damaged hair stretches when wet but doesn't spring back — it deforms without recovering its shape. The cuticle blisters at temperatures above 180°C on already-compromised hair.
Signs: stretches wet but doesn't spring back, limp rather than floppy, straight sections in naturally wavy or curly hair, ends that feel gummy when wet, persistent dullness products can't fix.
Recovery
Whether you're dealing with dryness, heat damage, or both, recovery follows the same staged logic: stabilise the damage, restore moisture balance, reduce future exposure. The timeline depends on severity. The direction is always the same.
The beginner's path
- Dryness vs heat damage — the diagnostic (3 min)
- Moisture and protein balance for dry hair (5 min)
- Heat tools — temperatures by hair type (4 min)
- Heat protectant: what it does and doesn't do (4 min)
- The six-month recovery protocol (6 min)
Everything we've published on dryness and heat damage
- How hot is too hot? Heat damage temperatures by hair type
- The wet elasticity test — your most useful diagnostic
- Heat protectant — what it actually protects
- Moisture and protein balance — a starting guide
- Can heat-damaged hair recover? The honest answer
- The six-month recovery protocol
- Bond builders — which generation is right for you