Botox in masseter stopped working

One measure of how effective the treatment was is to check the progress of the Botox taking effect; place both hands on the side of your face and bite down. If even after 2 weeks after injection the masseter is noticeably moving, then it is still active. This indicates the dosage or the area where the Botox was injected was not sufficient to relax the muscle and relieve the bruxism.

I'm sorry to hear that you're experiencing this issue. Some patients can develop resistance to Botox over time due to the formation of antibodies that neutralize the effects of the toxin. This is more likely to occur with frequent treatments and higher doses. However, it's relatively rare.

Another possibility could be changes in your body's metabolism or the way your body processes the toxin. Changes in your health status, stress levels, diet, or exercise habits could potentially affect how your body responds to Botox.

It's also worth considering other factors such as the technique and placement of the injections, as these can impact the effectiveness of the treatment.

I would recommend discussing these possibilities with your healthcare provider. They may suggest trying a different brand of botulinum toxin (like Dysport or Xeomin) to see if you have a better response. It's also important to ensure that your treatment is being administered by a qualified professional who is experienced in these procedures.

Remember, this advice is meant to be general in nature, and specific causes may not apply to your situation. Always consult with a healthcare provider for accurate information.