However, it recently came to my attention that there’s a reason for instruction labels (shocker!): If a mask isn’t applied properly, there can be negative side effects, like protein buildup, hair damage, breakage, and more.
What happens if you keep a hair mask in for too long?
According to trichologist Isfahan Chambers Harris, MPH, PhD, “Leaving a mask in too long may result in residue build-up, over-conditioning, weakened hair, and irritation or sensitivity. “
When the hair is wet, some cuticles begin to open, making the hair more sensitive,” says Sachie Kumagai, a master colorist at Warren Tricomi salon in New York City. “Sensitive hair is more prone to damage