Healing of Nerves After Chin Lipo and Augmentation?

The nerve most commonly traumatized in this surgery is the marginal mandibular brance of the facial nerve.  It is very uncommon to have a permenent injury to this nerve but temporary weakness is not uncommon.  Hopefully the neve will start to return in another 3 to 5 weeks.

this type of week lower lip certainly can happen after liposuction and can take several weeks to even months to completely recover. The concerning thing for patients is that it is a very slow process and happens gradually. Full disclosure, and my patients who we are trying to get the most dramatic result in have this to some degree up to 10% of the time.  I've made it a point to discuss this with my patients during consultation.  

There's a few contributors:

a large muscle called the platysma is inherently damaged during this procedure. It's unavoidable and this can change your expression slightly and should recover with time usually with a full recovery.

Another issue is that a branch of the facial nerve called the marginal branch dips down just below the jawline then comes back up towards the corner of the mouth and the chin. This nerve is often temporarily damage during the procedure. This also recovers but takes time. Permanent damage to this is infrequent but when you're the patient recovering from it it sure feels like it's permanent. You may have to be very patient with this and if you're surgeon is telling you it will take time they are not ignoring you there simply stating the facts.

Your surgeons not a bad doctor and just give it some time. There are essentially no options to accelerate this process.

Think back to your original consultation and the degree of improvement that you are seeking. As a rule if you want more results you're putting a little bit more at risk and adding to your healing time. If the plan was to do the very best he could and be as aggressive as possible for the most dramatic change you could get from such a procedure then your healing time is going to be longer.