What you describe is temporary most likely. It can take 3 weeks to 3 months to fade. If it is deeper trauma, it can take up to 6 months to a year to fade.
Take a picture and ask your laser specialist or stop in and have them give their opinion. You can submit a picture here by uploading to photobucket and copying and pasting the tags here.
The brown spots I mentioned coincide with the pressure I feel when sitting down - I think it might be related to the bones that exert pressure on the buttocks when sitting down.
Would this be considered “deeper trauma”? I have unwittingly lost a lot of weight which might explain why I feel a bit of discomfort when sitting down.
As a precaution I will not be having any more LHR on that area.
The laser light shouldn’t penetrate to the bone on the buttock area? I know you are speculating as best you can, but that doesn’t sound like a plausible outcome.
What I meant was that perhaps the bones exerted more pressure than usual on the area and may have produced a slight redness in the area, so when the laser was used it might have helped to create those spots by accentuating those possible red marks - which I imagine must have been there.