Do you need a defuser for scrunching hair?

a diffuser will dry curly hair faster, and encourage curl formation on hair that is wavy or unevenly curly. it 'diffuses' the air flow from your blow dryer to give a more gentle drying heat. if you have fine, limp or wavy hair, a diffuser will perk up your curls and, with the right volumizing product, help give more fullness. if your curly hair is very thick, coarse and gets frizzy easily, natural air-drying may be a better idea; sometimes blow-drying, even with a diffuser, can cause more frizz.