Will Kybella help with my double chin, undefined jawline and weird lumps in my cheeks?

Kybella was designed to reduce fat under the chin, so yes it will help your double chin but will do nothing for weird lumps in your cheek. Removal of the double chin may help some with the jawline definition.

Thank you for your question and photos. Kybella is a great option for sub-mental fat and joules in the lower face. I recommend using an HA filler for your mid-face to help with contour of the cheeks. 
Visit your Cosmetic injector and/or plastic surgeon for a full facial consult and treatment.

Best of luck!

Both Kybella or neck liposuction are good options and will improve the double chin. It depends on your lifestyle and personality which would be better for you. 
Kybella is best for patients that:
1)  Do not want surgery 
2)  Are not surgical candidates 
3)  Not willing to wear a compression dressing around the face for 1 week 
4)  Patient-  The results of Kybella will take months
Kybella take 1-3 treatments every 6 weeks.  Patient will develop swelling and possible bruising after each injection that may last a few days.  The benefit of Kybella is each treatment is quick and completed in the office. However, some patients need more than one treatment to get desired results. 
Neck Liposuction is best for patients that:
1)  Want a single treatment 
2)  One recovery time-  Downtime for neck liposuction require wearing a wrap around face for 1 week. 3)  Less painful 
4)  Quicker results 
5)  Cost is a concern
Neck liposuction is a quick surgical procedure that can be complete while the patient is awake.  It cost around the same price a Kybella and can be less in patients with heavier necks.  The single recovery of neck liposuction may be a better option for some patients.
I hope this helps.