So the cause for OCD is unknown and doctors cant find out why people have OCD. 
That is a huge issue that needs to be resolved, I have a couple of friends that have OCD.
people who are workaholics and people with miserliness are often the ones affected by OCD
Yes but my friend is the opposite but he has a fear of germs and needs to have thing symmetrical or in perfect order. 
I myself have a slight OCD for having everything perfectly in order and also a clean house is a must
It could be considered OCD or could just be good habits, regardless in my friend you can tell its an extreme case. Whenever I look at him weird he just tells me "you know how i am".
following infections. The diagnosis is based on the symptoms and requires ruling out other drug related or medical causes. Rating scales such as the Yale–Brown Obsessive Compulsive Scale (Y-BOCS) can be used to assess the severity. Other disorders with similar symptoms include anxiety disorder, major depressive disorder, eating disorders, tic disorders, and obsessive–compulsive personality disorder.
Treatment involves counseling, such as cognitive behavioral therapy (CBT), and sometimes antidepressants such as selective serotonin reuptake inhibitors (SSRIs) or clomipramine.
and tic disorders with OCD is challenged by neuropsychology and pharmaceutical treatment. Whereas OCD is treated with SSRI, tics are treated with dopamine blockers and alpha-2 agonists.
Trichotillomania.
Trichotillomania is an impulse control disorder which causes an individual to pull out their hair from various parts of their body without a purpose. The cause for trichotillomania remains unknown. Like OCD, trichotillomania isn’t a nervous condition but stress can trigger this habit. For some people pulling their hair out of boredom is normal, but that isn’t the case