What Can One Do to Decrease Numbness and Tingling Sensations Following Chin Liposuction?

This is something that should improve with time, and there is not much that can be done in the meantime. I would recommend discussing this with your surgeon, so he/she may examine you if necessary. Thank you, and best of luck with your recovery. 

However, it is common enough.  In my patients, less than 5% of patients report this type of abnormal sensation.  It is in my consent that this is a possibility.  The good news is that generally sensory changes resolve with time.  Rarely there may be a small area of residual paraesthesia, which is the abnormal sensory changes you are describing.  There is no way to really speed up this healing process.

Without seeing you it's not possible to decide why you have these symptoms

Most likely they will improve over several months

Discuss this with the physician who performed your procedure