After inner thigh Lipo surgery will pillows be needed to place between my legs?

You will be in a compression garment after liposuction, so the position that is most comfortable is what you should use to sleep. This may take some attempts to find the most comfortable position but you really don't need a pillow unless it is more comfortable.  

Dear ann doe,every plastic surgeon has his own postoperative protocol which he recommends to his patients. I would suggest you to discuss this with your plastic surgeon.Daniel Barrett, MD

Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Ann I appreciate your concern, however most patients recover and sleep fairly comfortably after liposuction with normal prescribed pain medications. Most people describe the pain after liposuction as similar discomfort or soreness felt after a really hard gym workout. If pillows between the legs add comfort, by all means give it a try!  Be certain to consult with a board-certified plastic surgeon in your area to increase your chances for the best possible result. Good luck.

This will vary from surgeon to surgeon. Best guidance will come from the PS who performed your inner thigh and ab lipo.  His/her post-operative guidelines will detail the protocol you should follow for optimum results.

You can position yourself however you are comfortable after liposuction.  You will be wearing a compression garment though.

Liposuction is the suction removal of subcutaneous fat. Subcutaneous fat is located just below the surface of the skin and above the muscles and bones. It doesn't remove all of the fat, but it does remove the majority of the fat. The perfect candidate is at or near their ideal body weight and has localized areas of fat that are out of proportion to the rest of the body. 
It is not a weight reduction technique. It can be used on any area of the body, but it relies on the skin redraping after the fat is removed. So, if you have loose skin, you may end up with wrinkles or folds after the surgery. Some areas respond better to liposuction than others, the lateral thighs always look nice, the inner thighs and arms, not so much. The tummy depends on how loose the skin was to begin with. It does not remove or improve stretch marks. There are many different terms used for liposuction:
Tumescent liposuctionPower liposuctionLaser liposuctionVaser liposuctionSmart liposuctionUltrasonic liposuctionAnd many, many more. All these techniques vary a little, but the bottom line is that the fat is removed by high powered suction. A small tube or cannula with multiple holes at the end is hooked to a suction device. The cannula is moved rapidly back and forth to remove the fat through very small incisions in the skin. All blood vessels, nerves, muscle, bone and skin is left alone, just the fat is removed. Large amounts of fluid are placed in the subcutaneous fat before the suction begins to reduce bleeding and to numb the skin, this fluid is referred to as tumescent fluid and consists of a balanced salt solution mixed with adrenalin and a local anesthetic. There are 3 choices of anesthesia:
Local anesthesia (the patient is awake)Local with sedation (the patient is given a mild sedation)General anesthetic (the patient is asleep)The choice is based upon an agreement between the patient and the surgeon. Make sure you consult with a Board Certified Plastic Surgeon who operates in a nationally accredited surgery center and offers board certified anesthesia. If the price you are quoted seems abnormally low, please do your research and find out why, you do not want to be surprised the day of your surgery!
Liposuction can be combined with many other procedures; tummy tuck, breast reduction, thigh lift, arm lift, neck lift and is an essential part of a Brazilian Butt lift (this is where the fat comes from!) All of my patients are treated post operatively with a compression garment that is worn for 2 weeks and 5 Endermologie sessions that start 3-4 weeks after the procedure. Endermologie is a non surgical massage technique that helps to smooth out the results of the surgery to help prevent wrinkling and rippling of the skin.
Liposuction is not a very painful procedure and recovery is usually quick. Most people are back to work in 3-5 days and back to vigorous exercise in 2 weeks. Of course, if more areas are treated, there will be more pain post operatively and a longer recovery. I was back to work 3 days after my abdominal liposuction and no one knew any better! 
The cost varies not only from city to city, but from patient to patient. The more areas that are treated, the higher the cost. In the midwest, typical liposuction prices varies from $3,000-6,000 total.Good Luck!

Hello dear!
Thanks for the question and provided information as well.
You could try that for comfort, but it is not really mandatory. Remember that each doctor has their own procedures.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

Sleeping with a pillow between the legs will help with comfort.  Also, wearing a tight compression garment will promote healing and comfort.  Check in with your surgeon for his post operative instructions.