Normal for Lumps and Numbness to Remain 16 Weeks After Lipo?

Numbness, firmness and swelling can last for several months. Ask your surgeon if it's okay to massage your flanks and abdomen. Massage will help to decrease the swelling faster and to smooth out any irregularities. You can massage each area in all directions using your hands, or, a soft paint roller. Massage should be done once or twice a day for up to 20 minutes. 

Many people derive the maximum benefit from liposuction six months after the procedure. Numb areas could take more than a year to resolve but may last indefinitely.  Hard areas may continue to resolve, but massage, warm compresses, and treatments with external ultrasound or Endermologie or Velashape may improve these areas.  If there has been excessive collagen produced or some blood that solidified, then corticosteroids may help. See your surgeon to ask what procedures can be done to improve your result.

Lumpiness and numbness are known occurences after lipo, though I very rarely see them after traditional techniques. On the other hand, I often see patients who have had a laser lipo procedure who come in with these problems seeking revision. It seems to be most common when the laser lipo is done where there was some looseness to the skin or a very large volume was removed. I wish I had better news, but correcting these problems can be very difficult. There is still some potential for improvement with time however.