12 day post Vaser Lipo. The itchiness is driving me insane. Is this normal?

Yes, as the skin heals, itching can be normal. You may also have swelling, which can last 3-6 months after your procedure. I recommend adding hyperbaric oxygen and lymphatic massage along with your compression to help decrease swelling. To improve your final results, I also recommend adding vanquish for further fat removal, exilis/venus legacy for skin tightening, cellutone/z wave to make the skin smooth, remove scar tissue, and improve the skin’s appearance. See an expert. Best, Dr. Emer

Thank you for your question.  Itching following any type of surgery, including liposuction, is very common.  This can be multifactorial.  It could due to the medications, garments, the healing process, soap, etc.  
The swelling and tightness sensation is also very common this soon after surgery.  Patients often describe a hard/woody feel in the immediate postoperative period.  Expect swelling to persist for 6-12 weeks.  Over this time, the feeling will soften up.  
Garments should be snug, but not tight.  Patients often times say that they difficult or uncomfortable, but not painful. 
Best thing to due is contact your surgeon with your concerns.  They will help guide you through the postoperative healing process and recommend medications to help alleviate your symptoms.  I hope this helps!