As the fastest way to slim down the face, the treatment principle of face slimming injection is to block the nerve impulses between nerves and muscles, relax the over-contracted muscles, and paralyze the over-developed muscles, so as to achieve the effect of slimming the face. Masseter muscle hypertrophy was treated with biomycin injections. Korea IDEA is a well-known beauty institution in Korea. The director said that women are most beautiful with oval faces and often require plastic surgery due to enlargement of the mandibular angle. More than 90% of these patients have benign masseter muscle hypertrophy and hope to reduce it at the same time.