Can Botox to masseter muscle affect my ears?

Hello, As a Head and Neck Surgeon who also practices in Facial Plastic and Reconstructive Surgery, I see alot of ear pain. One common confusion with this, is that not ear pain is actually ear pain. Many times, it is due to your jaw joint (The temporal-mandibular joint or TMJ). The masster is one of the muscles that moves the TMJ. If you had a bit too much on one side, you may have some assymetry of your jaw motion now and are feeling it as pain in your ear. The TMJ actually forms the front part of your ear canal, so this is very common. My advice would be to see your surgeon who treated you and assess you bite. Dr James Bonaparte

It is possible that a nerve was irritate when the Botox was injected or you coincidentally have an ear infection.  I would consult an ENT specialist for evaluation.  Best, Dr. Green

This is a great question.  When we place botox for master hypertrophy or overuse, we do place the needle into the muscle and inject the muscle.  This can cause mild inflammation.  The auriculotemporal nerve exits the deep fascia just above the master muscle, and this nerve can sometimes have swelling and associated pain in the same distribution that you are having.  This should pass within a week, but it can also be a sign of TMJ pain.  Occasionally the joint itself, is the cause of the issue that you are having.  Therefore, try NSAIDs for pain and swelling and ice for inflammation.   I hope you improve soon.