This is what ChatGPT says:
The idea that increased muscle tone or chronic contraction of the facial and masticatory muscles can lead to hair loss is considered pseudoscience. There is no scientific evidence to support this claim, and it is not a recognized cause of hair loss by the medical community. Hair loss can be caused by a variety of factors, including genetics, hormonal changes, medical conditions, and certain medications. Therefore, it is important to consult with a healthcare professional to determine the underlying cause of hair loss and develop an appropriate treatment plan.