What could be causing pain and tightness around the recipient area 4 days post-operation? (FUE, 2000 grafts) (photo)

I had a 2000 graft FUE procedure four days ago. The night of the surgery I had tenderness and pain in my forehead on both sides that prevented me from sleeping. It took 2 T3s to sleep. The pain resolved the day after surgery as my face started to swell. The third evening, the pain came back (tenderness to touch, tightness, pulling in certain areas, all at about a 4/10, but constant and unrelenting) but only on one side. Advil did little, but 2 T3s again did the trick. 4th day there’s still pain.