What options do I have for chin/jawline liposuction if I'm prone to keloids?

Thank you for your question and for sharing your photos. There are several options for contouring the neck.Non surgical options include: 1) Kybella to dissolve the fatty tissue in the submental area 2) Cool-mini treatment from Coolsculpting to target the same area 3)
Adding a skin tightening device such as Ulthera or Profound to the neck
tissue in conjunction with the one of the above to further tighten the
skin. Surgical options include: 1) Straight liposuction which would reduce the pinchable fat under the chin2)
Anterior neck lift with liposuction which would also allow for
tightening of the platysmal muscles in the midline to allow for tighter
neck contour3) Traditional neck lift which does the same as 2) but also removes some excess skin in the neck.Based on your concern with forming keloids, I would focus on the non-surgical approaches.  I
would recommend that you visit with a board certified plastic surgeon
who offers the various options above to discuss the pros/cons of each
option and help you decide which is the best for you.

Both Neck Liposuction though a tiny incision which can be done as an office procedure under local anesthesia or a non surgical method - injecting Kybella. Kybella is a new injectable approved by the FDA for the treatment of moderate to severe fat under the chin; double chin. Up until now the only option for fat removal under the chin was liposuction or surgically removing the fat by cutting it out. Kybella is the first ever non-surgical option for dissolving double chin fat. Dr. Derek Jones, an associate clinical professor of dermatology at UCLA stated “upwards of 80% of people [with double chins] are concerned about the condition.” Dr. Jones was the lead investigator in a study sponsored by the drug’s maker, Kythera Biopharmaceuticals. The problem of a double chin can affect men and women of all ages. Until now, liposuction was the preferred treatment for most of their younger patients with good skin laxity.Other options include RF (Thermi Injectable), Cool Sculpt.#DoubleChinOptions

 It is very rare to get a keloid in the submental area after submental liposuction. Without a set of pictures, it's impossible to give any determination about what may be required. Close followup after any incision with your  surgeon is required, so that if keloids do develop, they can be immediately addressed with steroid shots