Wore hat and now have scalp compression

[Namesaredifficult]

Seeking some reassurance that I haven't just messed up my HT at day 18 post op.

Today I wore a hat for a few hours and after removing it, noticed two dents in my scalp where the scalp had been compressed and they are still there but improving slightly one hour later. The compression was in the transplanted area. I'm getting some minor dull ache/warm sensation in these areas of compression.

Could this have caused damage to the grafts or am I over thinking it?

[HappyMan2021]

grafts are 100% secure between days 3-10. 

I suppose blood compression/constriction could have some tangible effect on growth strength/yield on Day 18 still. But...the blood compression would have to be severe enough it caused you to pass out or faint or something. Since you did not even notice this till visually looking at your hat, I'm pretty sure you are in the clear. 

For peace of mind - for the next few months just be sure to wear loose fitting hats.