I suggest you eat more liquid food, such as porridge and soup, to make the masseter muscle smaller, and don't eat eat small fish dried shredded squid beef jerky and other foods that make your mouth move. You can have a proper massage. Before going to bed at night, press the largest part of the masseter muscle with your fingertips, which obviously feels sour. That's the result of your muscle fatigue and the accumulation of a lot of harmful substances. Then gently massage counterclockwise. It is best to gently pull five times from the ear to the clavicle with your fingers to help lymph metabolism eliminate facial edema. And gently press the clavicle five times to help the metabolism of harmful substances, that's it ~!

Good luck ~ ~ hehe