Would 6 units of Botox in Frontalis Muscle cause this drastic eyebrow arch? Will it go away fast? It was a small amount (Photo)

6 units isn't a lot for the forehead if the glabella (middle brow) wasn't treated.  This can cause numbing of the muscle for up to 3-4 months.  I suggest waiting 2 weeks to see the full affect and then deciding if you need to even out with more or if waiting 3-4 months would be best.  Dr. Emer.

Thank you for question. Injecting Botox only in the frontalis muscle (forehead) can result in an eyebrow arch (spock brow). Only the central part of forehead has been treated and not the lateral part of muscle. This can be corrected by injecting a few units of Botox over the lateral aspect of each brow. I recommend having a consultation with your treating physician. 

Thank you for
your question Ladythebug. I am sorry to hear about your situation. Botox is
a purified protein used to address wrinkles associated with facial expression such as the horizontal lines seen on the forehead when one raises the brows. To address such lines the frontalis muscle on the upper forehead is treated. This muscle is variable in shape and size from person to person. But for the most part it is a broad muscle that extends from one side of the forehead to the other side. If the central part of the muscle is treated with Botox, that part will relax and it will be difficult to raise the brows in the area of the central forehead. However if the outer parts of the muscle are not relaxed with Botox they will still be able to raise the corners of the brows as in this case. This is easily treated by placing a small amount of Botox (1-2 units) in the outer aspects of the forehead. Please consult with
a doctor for specific recommendations. Good luck!