What's the differerence between perfectionism (an element of the classic TMS personality) and OCD?
Is it a matter of degree? Or merely semantics?
While they may seem similar in some cases, I'd say perfectionism and OCD have some key differences.
OCD is essentially an anxiety-focused obsession, where compulsions are performed to temporarily ease that anxiety. If the anxiety focuses around perfection (e.g. everything being perfectly organized or sanitized; having perfect handwriting; moral perfectionism), then OCD can seem quite close to perfectionism. However, for the OCD sufferer, the compulsion can go to extreme lengths. Most perfectionists wouldn't wash their hands until they bled, for instance. In such instances, I'd say perfectionists can avoid those irrational extremes.
And then in other cases, the anxiety isn't centered around perfection, but just avoiding a horrible outcome. In my case, I had religious OCD. My obsessions focused around avoiding behavior that might send me to hell. In that case, I wasn't trying to be perfect. I was just terrified of doing really bad things that would result in damnation.
Other people feel the need to tap a door an even number of times before entering, and if they don't, they think some one will die as a result. It's irrational and an fear-based obsession, but again, nothing a perfectionist would do.
Most folks with OCD also realize their obsession is irrational, but are still trapped in the anxiety cycle, while most perfectionists I know really think they're being rational. In that sense, I'd say it's less a matter of degree and more a qualitative difference.
That being said, there's a lot of overlap with elements of TMS and OCD, and I definitely think their linked in my case and for many others.
There's a variant of OCD called "Pure O" that I suffer from, and it results in obsessive thinking about a particular anxiety. I found myself engaging in the similar behavior when google my health symptoms. I could not quit and I spent most of the day doing it.