Can botox to the 11s only cause eyebrow or eyelid droop?

More than likely your eyebrow droop was from the location of your botox and improper layer as well.  Medial brow ptosis or descent of the central brow can occur for several reasons:
Botox placed too low within the frontalis muscle along the forehead including central forehead.  The frontalis muscle elevates the forehead and by decreasing activity here the central brow can drop
Botox placed too superficially along the corrugator.  The botox will again impact the frontalis muscle and paradoxically lower the central brow.
Botox is best injected by an experienced injector to lessen wrinkles while improving facial appearance.

The easiest way to improve your results after treatment with Botox is to seek out a better injector.  Inform your surgeon about your past issues, and he/she should be able to tailor your treatment to achieve a much more attractive result.  

Thank you for the question. The eyebrows can fall if Botox in injected too low in the forehead. Inexperienced injectors frequently cause this problem. Injecting the area between the eyebrows (the 11's) is less likely to cause ptosis; however, occasional the Botox can migrate to the upper eyelid and cause ptosis. Fortunately, the drooping eyelid usually resolves within a month. Make sure you see an expert injector. Good luck.

Botox can cause eyelids and eyebrows to droop depending on where it was injected.  I suggest speaking to a cosmetic dermatologist or plastic surgeon who is experienced to prevent this.  Best, Dr. Emer.

Hi Armstrong,Drooping of the eyelid after Botox injections is fortunately very rare, but can be avoiding by injecting the correct dosage into the proper place.  This complication can be avoided by using the neuromodulator properly.  Make sure that  you choose your treating physician most carefully.  Good luck and be well.Dr. P

If injected properly neither of these issues can occur. If Botox is placed too low or too deep in the glabella it can cause an eyelid droop. If placed too high it can cause a droop of the inner part of the eyebrow. Your best option is to seek treatment by an experienced physician injector - either a plastic surgeon or dermatologist. I hope this information is helpful for you.Stephen Weber MD, FACSDenver Facial Plastic Surgeon

Botox can be an excellent treatment for the so-called 11s, those vertical creases between one's eyebrows, in the central lower forehead.  Experience allows us to place a proper amount of the drug in specific portions of the muscles in that area to achieve a noticeable improvement, with very low risk of weakening the other muscles that lift the eyebrow or eyelid.  Lowering of the eyebrows would usually be related to Botox placed in muscles above the eyebrows, rather than between them.  Be sure your doctor is aware of your results, including in-person evaluation.

Proper placement on the brow area should result in brow elevation. Improper placement, and or over diluted Botox will result in the problem you experienced before. Find a proper injector, who understands anatomy and function of the face.This will ensure you achieve the correct result.

The neurotoxin you had was either placed too closely to other muscles that cause drooping or diffused into the wrong area. When done correctly, neuromodulators give a great cosmetic result. 

Thank you for your question. Every procedure you do has the potential for negative side effects, however when Botox is injected properly you should not experience drooping. Make sure you are confident with whom you go to. Best Wishes,Pablo Prichard, MD