Wise to change thought patterns?

[Joewest439]

When certain past obsessions pop into my head, I feel anxious that I will once again become attached to them, like they are sensitive topics, and so I try to 'change the subject'. 

Is this method counter productive? I mean, could it be an act of avoidance, that is spurring the obsession to keep popping up? I feel that not changing the subject in my head would inevitably result in getting reattached to the obsession, so I feel like I don't know which way to turn.

It feels like common sense to me to change topics, but also feels as if it's an act of thought suppression?

Thanks

[PolarBear]

This is where it gets tricky. Forcing yourself to switch topics in your head is reacting to the thoughts. Better you think 'yeah whatever' and continue with what you were doing.