The pathologic basis of a wide chin is a wide jaw angle and a hypertrophied bite muscle, which can often be surgically adjusted to narrow a wider chin. There are three main surgical approaches, namely the extra-oral approach, the intra-oral approach and the combined intra- and extra-oral approach. Surgical methods include jaw angle osteotomy, partial removal of the bite muscle and simultaneous osteotomy and muscle removal. It is best to eat only liquid food for two days after surgery, and the stitches can be removed in seven days. After the surgery, the jawline of patients will be improved. For hypertrophic biting muscles, Botox injection is feasible. Botox is an exotoxin produced by Clostridium difficile, and there are 8 subtypes of Botox. There are 8 subtypes of Botulinum toxin. Currently, Botulinum toxin type A is the main type of Botulinum toxin used in the clinic, which is initially used to treat myasthenia gravis, blepharospasm, and hemifacial spasms, etc. Later, some people have found that injecting Botulinum toxin into the local area of facial wrinkles has better temporary wrinkle removal. Side effects after Botox injections are rare, such as pain at the injection site, which may affect pronunciation and swallowing difficulties. Botox injections may be an effective alternative to surgery to improve a wider chin, but its effects do not last long and the recurrence rate is high.