I had forehead reduction/hairline lowering, I'm beginning to get indentation on my forehead, is this permanent? (Photos)

Thank you for your photos and question.  Although post-operative swelling can cause some mild and temporary irregularities, it is best to see your surgeon if this hasn't resolved after a week.  Best wishes to your recovery.

It is best to contact your surgeon for post surgery issues and care since all doctors have slightly different instructions.

Apparent elevation of skin in forehead in first few days is normal after surgery. What you show is a few weeks later and is concerning. You should see your surgeon in followup.