Is This Just Simple Swelling After 9 Weeks of Having a Tummy Tuck or is Something Wrong? (photo)

As always, it is best to be seen in person ( by your plastic surgeon) for precise diagnosis and treatment.
Abdominal wall "swelling" after tummy tuck may be related to:

1. Swelling in the soft tissues.  This may take several months to resolve and may worsen with increased activity  or at the end of the day.   Patience  is required to allow for resolution of the swelling. The swelling occurs because of the interruption of venous and lymphatic channels that occurs during the tummy tuck operation.
2. Fluid accumulation in the space between the skin and the abdominal wall muscle.  this may consist of blood ( hematoma)  or serum (seroma).  This fluid accumulation can generally be diagnosed by physical examination ( occasionally ultrasound  may be helpful).  Treatment consists of aspiration;  several episodes of aspiration may be necessary. 
3. Separation of the abdominal wall muscle repair may lead to a swelling/bulge appearance. This may be diagnosed on physical examination  with your surgeon examining you in different bodily positions. One of the steps of a tummy tuck procedure involves reapproximation (plication)  of the rectus muscles.  These muscles have spread apart during pregnancy and/or weight gain. Bringing them together again in the midline helps to “tighten” the abdominal wall as well as to narrow the waistline.
4. Residual adipose tissue may be confused for swelling. Again this is most easily diagnosed by physical examination. Additional liposuction surgery maybe necessary to improve the results of surgery.

Generally, it takes many months for swelling to resolve after tummy tuck surgery and it may take up to one year  (or greater)  a complete skin redraping  to occur.

I hope this helps.

From your preop photo, you had very little fat to start off with.  I would guess that what you have is mostly swelling from your surgery, which is very common above the incision as the incision affects the normal pathways for drainage of lymphatic fluid.  Compression and massage may help your situation.  Please consult your surgeon and follow his advice. 

Thank you for your questions.

     I do not see any skin laxity in the first picture and there is hardly any fat and the abdominal muscles are visible.  I am not even sure how the full tummy tuck could have been performed.  At any rate, swelling after tummy tuck may last for several months.  Continue following up with your plastic surgeon.  Kenneth Hughes, MD Los Angeles, CA