If you’re outside and feeling angry, it might be because you forgot your sunglasses. Yes, squinting can make you angry.
“On the sunniest days, we squint; and squinting can make us angry,” explains Daniele Marzoli, PhD, a psychologist at Italy’s University of Chieti-Pescara.
The screwed-up expression we make when we squint is essentially a frown. Since mood and facial muscles are linked, the face signals to the brain that we’re irritated. The link between squinting and feeling irritated occurs almost instantly.
Luckily, there is a quick and easy fix to this mood changer: sunglasses.
So, to avoid feeling angry or irritated the next time you head outside, remember to wear your sunglasses.