Masseter Botox: how botulinum toxin is injected into the jaw muscle

What the numbers show

1. 11. Side of the jaw · masseter, example injection area
2. 22. One of the injection sites
3. 33. Needle
4. 44. Epidermis
5. 55. Dermis
6. 66. Subcutaneous fat
7. 77. Masseter (chewing muscle)
8. 88. Injection site
9. 99. Injection site, enlarged
10. 1010. Lower jawbone (mandible)

In the film

1. Injections are spread over several points in the muscle.
2. A fine needle enters the skin.
3. The needle tip sits in the masseter, beneath the skin and subcutaneous fat.
4. The medication is injected into the muscle.