How to fix crease above butt crack? 5mo post op LBL, 150+ lbs weight loss. (photo)

A scar revision to redistribute tension would be appropriate.Kenneth Hughes, MD, ABPS Board Certified Plastic SurgeonLos Angeles, CA

If you are questioning about the elongated butt crack vertical crease then a flankplasty may be needed to pull the lower back tissues towards each flank and eliminate that crease. If you were concerned about the residual horizontal folds of skin in your lower back then a bra-straplasty to lift this tissue upwards can be very effective. Glad to be of help. 

Hello dear!
Thanks for the question and provided information as well.
Based on your pictures, you are a good candidate for liposuction, to improve your waist, back and flanks, and I think you'll get very good results. 
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
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 :)
 

many years ago when I was a resident I was working with a very talented but perhaps the most arrogant surgeon I have met to date. He specializes in nose  jobs in orange county.  He said something I will never forget. Actually he said a lot of things I'll never forget but one of them was only God can create creases. He said never make surgical incisions directly in the crease. Go to the side of it. He was absolutely right.  The midline crease on your back is complex. It's a combination of skin and connective tissue that formed many years ago in utero when your body was the size of a giant shrimp. The body develops as two halves that seal it in the midline early during embryology. For some people the two sides don't seal together completely leading to things like cleft lips and spina bifida( failure for the skin to fuse leaving the spine exposed). Your body is unique in that this crease continues from your gluteal crease all the way up your back.  It could've been addressed to some degree when you had your wraparound tummy tuck. Fleur-de-lis... by sewing the away from the midline on the back. Still, with the amount of skin laxity you have I don't think it would have eliminated  the crease.  The only way to make it go away is to cut it out and exchange it for a scar. You could put Z-plasty's in this car so it doesn't look like a straight line. Some people hate scars some people don't mind them it just depends on how important this is for you.  There's no easy simple way to fix it I can assure you of that.  In the big picture this seems like it should be a fairly low priority.  Somethings bother some individuals to the point of requesting surgical intervention. For others it's a non-issue.  Who am I to say what's important and what's not?  Best, Mats Hagstrom MD