When you’re driving, taking a test, in class getting sleepy… You need to concentrate on what you’re doing but you can’t and everybody experiences that all the time.

However, there’s one thing you can do quickly to refocus.

Put your hand between your ears, on your chin and feel for the masticatory muscle. Then start moving the muscle. You don’t have to open your mouth but start trying to chew. Repeat for 30 to 50 times. You’ll feel your brain refocusing.

But… why? There’s a cluster of veins that sends blood to your brain which is located near the masticatory muscle and every time the muscle contracts by chewing, the veins are pushed and blood rapidly will be sent to your brain. Also, extra oxygen and glucose are sent to brain so you can concentrate more.