my son had a cranioplasty two weeks ago, to put his skull flap back on after 3 months of having it off, but the fluid surrounding the incision site has never really absorbed, they don t think he needs a shunt , ust monitoring for now, but how long should it take to absorb weeks months? also he has so much fluid on that right side while his skull was off for 3 months that his skin stretched and they think fluid is their just because the skin is loss. any experience with this?