Why do I have a shelf/bulge/roll after TT with MR? 4 mo P.O., it seems to be getting larger with time? (Photos)

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  Based on
your photographs, you may benefit from a revision surgery with lowering of your scar and thinning your abdominal flap.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.  
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon

I think you are appreciating  the bulge is getting worse as the swelling is coming down and so you see a difference between the  thickness of the upper flap and the lower area around your Mons. 
I think you would benefit from a revision and thinning of the upper flap  and lining up the  upper part of your abdominal area and the lower part of abdominal area better.You could likely have removal of the vertical scar completely as well.  Usually if you have a tremendous amount of excess skin that a vertical incision is not required.
It's hard to say just based on picture, I would have to see what the tension of your skin is, but I think you definitely would be a candidate for a revision  and excision of more skin and better alignment of your abdominal flap with your Mons area. I would suggest going back to your surgeon and talking with him or her and seeing if you would be a candidate. 

There are a multiplicity of reasons for your issue including residual fat requiring liposuction, seroma or fluid collections that occurred after drain removal, an imploded scar due to closure issues and or wound healing issues.  A revision would help.  If I were doing it, I would use liposuction to smooth things out, along with a scar revision to lower the scar.  Touch base with your surgeon.