I the CBT course that I attended a while back, perfectionism was defined as something slightly different to how it's generally perceived. When it comes to a psychological diagnosis, it is more complex.

Perfectionism – Therapy for Overcoming Perfectionism.

I recognized myself in the clinical description. I have been working on these rather negative and debilitating aspects of my diagnosis ever since. I do think that it can arise from living in an atmosphere where perfection was expected and demanded of children. That was certainly true in my and my brother's case. Nothing less was acceptable.

It was stressful to live that way, and further complicated an already difficult childhood, and my young adult years.

But you can do self-therapy (I found several books and audio books just by typing "Perfectionism from a psychological standpoint" in the search engine), and of course, most qualified therapists should be familiar with the topic. I believe our facilitator assured us it it one of the areas in which a person can rather quickly turn things around for themselves, and it can make a huge difference in a fairly small amount of time.

I know that being made aware of it has helped me enormously.

Best of luck with it.