More information 👇 The muscle most commonly associated with the jaw is the masseter, whose contraction enables mastication To stretch it, all you need to do is perform the opposite action, which is of course to open your mouth Beyond external forces, voluntarily opening the mouth helps to achieve more intense sensations A stomach ache may set in following stretching, which is normal but very unpleasant 😆 Disclaimer : this has nothing to do with developing an aesthetic jawline, which is another