Is it scar tissue in nose of when pressing down thick skin with fingernail it goes down?

And i can see its just thick skin?I have really thick skin and had a steroid injection 4 weeks after surgery and continued to have regular shots for about 18 months. Results looked amazing and very defined with injections but inbetween injections it would go back to larger and shapeless, bulbous nose. When i press down the skin with my fingernail the skin goes down an it goes to where the skin i guess could shrink wrap... this is now 4 years after the surgery by the way. Is it scar tissue?