Does BOTOX® for TMJ Therapy Cause Any Side Effects?

May 8, 2026

Gloved hands preparing BOTOX injection

BOTOX® is best known for its cosmetic applications, but did you know that it is also a powerful form of therapy for TMJ disorder (TMD)? Yes, these injections can relax overworked facial muscles and lead to significant pain relief. But before you ask your provider about this treatment, you may rightly wonder if BOTOX carries any side effects. This blog post explains what you should know.

The Most Common BOTOX® Side Effects

For most patients, side effects after BOTOX treatment for TMJ disorder are mild and short-lived. Because the injections target overactive jaw muscles, the most common issues tend to stay near the treatment area and fade within a few days or weeks. You might experience:

  • Mild soreness at the injection site
  • Minor bruising or swelling
  • A temporary headache
  • Feelings of jaw fatigue when you chew

These effects do not mean that anything has gone wrong. In fact, they are normal and may just be a reflection of the fact that your muscles have started to relax.

Less Common Side Effects

Less common side effects can occur, especially if the dose of BOTOX is too high or the injections spread beyond the intended muscles. These problems are still usually temporary, but they require professional medical evaluation. Talk to your provider if you experience:

  • Noticeable weakness when you chew tougher foods
  • Slight facial asymmetry or a smile that looks uneven for a short time
  • Difficulty with jaw movements
  • Trouble with nearby muscles

Severe adverse reactions to BOTOX are extraordinarily rare. If you experience extreme swelling, difficulty breathing, or throat tightness, or severe dizziness, seek emergency medical attention.

Is BOTOX® Worth It?

For the right patient, BOTOX can absolutely be worth it. Here are a few points to consider as you weigh your treatment options:

  • When it is administered by a qualified professional, BOTOX is generally very safe. (Most patients tolerate it very well, and you can expect your provider to take all reasonable safety precautions.)
  • It provides powerful pain relief and can reduce the frequency of TMD-related headaches and migraines.
  • It is an effective complement to other forms of TMJ therapy.
  • The results can last for months at a time.
  • It is a conservative option compared to surgery and other invasive treatments.

Just like any other medical service, BOTOX can cause some side effects. Talk to a qualified professional to learn more about it so you can make a realistic, well-informed decision treatment decision.

Meet the Practice

At Smileworks General & Cosmetic Dentistry, our team is home to several highly skilled dentists. We understand TMJ disorder and the impact it can have on quality of life, so we are proud to offer BOTOX as a means of pain relief. We always prioritize patient safety! To learn more about us or to request an appointment, contact our Mt. Pleasant, SC, office at 843-351-6422.