I Had Endoscopic Forehead Lift/ Browlift and Can't Move Left Brow After 6 Days; What to Do?

This is not an uncommon usually temporary issue after browlift, and almost always the nerve will regain its function.  And no, Botox will not help with regaining of the nerve function.

Weakness or paralysis of one or both sides is not uncommon and usually transient in nature. It may be from what is called a traction injury (stretching of the nerves during the course of surgery), swelliing, or other causes. Tincture of Time is the hardest medicine to prescribe but a waiting approach is indicated, and the forehead should start moving within several  few weeks (sometimes even several months)  You might want to consider using Botox, or Dysport  on the working side (Not the injured side ! ) to at least give you some symmetry until your other side has a functional return. Regular visits with your plastic surgeon until the function returns is indicated.

This condition, known as neuropraxia, is usually temporary. The inability to move one or both sides of the forehead after endoscopic forehead lift, though rare, certainly is something we see. It may be from stretching of the nerves, swelliing, or other causes. A watchful waiting approach is usually best, and the forehead should start moving well in a few weeks (sometimes even takes a few months!) If things don't seem to be improving, Botox in the affected side will only make things worse. Sometimes, however, a low dose of Botox to the side that is moving well will relax this "normal" side to help keep things even while the nerve heals.

Of course, talk to your surgeon first.