First of all, let's make it clear which cheek muscle refers to: Generally speaking, the over-developed cheek muscle refers to the largest muscle in the picture, the muscle it chews. As an important member of masticatory muscles, masseter muscle plays an important role in chewing. From this sentence, we can also know that chewing can exercise this muscle, that is to say, chewing regularly (especially chewing gum, or keen on tough food, beef tendon or eating hard things) will make the masseter muscle more developed, and the masseter muscle of natural men will be more developed than that of women. At present, the popular plastic surgery method is to inject Botox, the principle is to paralyze muscle tissue (make it in a relaxed state, so it looks gentle). But the problem is the safety of Botox and the time limit of this treatment. Moreover, the amount and position of bilateral injection, the effect achieved depends largely on the doctor's operating experience. Moreover, after such treatment, the masseter muscle will contract poorly and eating will become ineffective. A more routine way is to change your eating habits and eat less food that is difficult to chew. Massage is also possible, but the effect is not great. There is another case of chin hypertrophy: the mandibular angle (a part of the mandible) is relatively large. (commonly known as square cheeks)