@suziet Did your surgeon advise you to wait longer until more healing of the incision has occurred before doing treatment? I have been through spinal fusion surgery on my neck, and incisions create scar tissue as you know, and also scar tissue in the fascial layers. I had to wait until 3 months before I could do physical therapy on my spine surgery scar, and that was also waiting for the fusion process to begin so it would not be disturbed. Sometimes healing is a long process and we just have to be patient.

Myofascial release can help treat scar tissue. My guess is right now, you have so much fluid in the tissue that it is being forced into your scar. As you heal further, hopefully the tissue fluids will lessen. Here is our discussion. MFR has helped me quite a bit and it can reduce tightness and get the body moving better. The first pages of the discussion have a lot of links.
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
Have you heard of MFR before? Does it sound like something you may want to try?