Tenderness and swelling possibly related to 6 mths old Thread Lift?

I got a PCL nose threadlift about 6 months ago, everything has been normal, but recently I have noticed tightness and tenderness between my brows accompanied with slight swelling which cannot really be seen, but felt. Today, my forehead area, above my brow feels swollen( abt 4cm) and tender, but now btwn my brows is not as tight. I asked the woman who helped me do it but she insisted its not related to the threadlift since its at my forehead. Is she right or is this related to it? Help please.