Botox - How Long Before Numbness and Drooping Wears Off?

Fortunately the results are completely reversible...be patient and you will return to normal. There are eye drops that may help temporarily to stimulate your upper eyelid muscle to contract and raise your eyelid if the droopiness is due to a direct effect on the eyelid muscle. If, however, it is due to an imbalance of your eyebrow raising/lowering (forehead) muscles, then the drops will not work.
You may have the impression that you cannot "feel" your lip, but Botox does not effect the nerves that carry sensation, rather only the nerves that carry the signals to muscles to move.
You don't have to give up on ever having Botox again, just be sure that you discuss your recent results thoroughly with your (next) treating physician.

The good news is that this is NOT permanent, and you will likely NOT have to wait 8 months...You are discussing a number of symptoms so let's discuss each:In terms of the lip function (whistling, eating, drinking, etc.) -- although it usually takes 3-4 months for the effects of the Botox to wear off,  it typically tends to last less around the mouth.In terms of the eyelid droop, this too does not last as long as the full duration of the Botox.  It should return sooner.  Fortunately, the eyelid droop tends to last shorter because the full Botox dose doesn't usually diffuse into the muscle that elevates the eyelid.In terms of the forehead and lip sensation, it feels weird because the muscle function in that area was targeted by the Botox.  Botox, in and of itself, does not affect the receptors that govern sensation.  It may "feel weird" in that area because the muscles are paralyzed by the Botox, but the surface skin sensation should be normal.So what options do you have in treatment...A droopy eye-LID due to Botox can be treated with Apraclonidine eye-drops which can provide a small (2mm) improvement -- Apraclonidine 0.5, 1-2 drops, 3 times per day. Make sure you put in one drop at a time, tilt your head back, and close your eyes to make sure none of the eye-drop leaks out.Be sure your prescribing physician discusses all the potential side-effects of the drops, such as "adrenaline-like" symptoms like anxiety or heart pounding; you may also experience eye irritation, eye dryness, and eye pain, amongst other symptoms. If these symptoms occur, you will likely need to take some lubricating eye drops, lower the dose, switch the eye-drops, or stop the drops altogether...In the future, be sure to seek the services of an experienced physician injector. I think the key with Botox lies in truly understanding the anatomy of the injected area, and more importantly the variability in the anatomy between patients -- for brows, the forehead, and anywhere else you plan on receiving a Botox injection. This includes having a firm understanding of the origin, insertion, and action of each muscle that will be injected, the thickness of each muscle targeted, and the patient variability therein. As an aesthetic-trained plastic surgeon, I am intrinsically biased since I operate in the area for browlifts and facelifts, and have a unique perspective to the muscle anatomy since I commonly dissect under the skin and see the actual muscles themselves. For me, this helps guide where to inject and where not to. However, with that said, I know many Dermatologists who know the anatomy well despite not operating in that area, and get great results.Good luck.

Botox
injections are associated with high levels of patient satisfaction and low
complication rates. Unfortunately complications related to migration of botox
can occasionally occur. Migration of 
botox can result in a droopy upper eyelid and weakness of the upper
lips. Botox only affects motor nerves, it doesn't affect sensory nerves. For
this reason, numbness of the forehead and lip can't be explained by the use of
botox.

When eyelid and
lip symptoms occur following the use of botox it usually takes about 4 to 8
weeks for spontaneous resolution. This varies depending upon the amount of
botox given and the strength of the underlying muscles.

When patients
are unwilling to wait for spontaneous resolution several options are available.
These include eye drops which partially reverse the impact of botox. These
include the eye drops Alphagen and Lodysine. Both are associated with excellent
clinical responses and high levels of patient satisfaction. Unfortunately,
there are no treatments currently available for lip weakness.

If you've
developed eyelid sag and lip weakness following botox it's important to consult
a board-certified plastic surgery. This surgeon should be able to make an appropriate recommendation.