I'd like to clarify the term OCD...

OCD is a seriously disabling disorder. The checking and other repeated things/thoughts are so profound as to interfere with life most of the time.

Obsessive behaviors are just that. Many people have obsessive personality traits. This is very different. The compulsion part may be present, and if so that is called OCPD --obsessive compulsive personality disorder. These people are very neat and orderly, but do not do the extreme behaviors usually seen in OCD patients.


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Certain occupations tend to attract obsessive compulsives... those that are detail oriented requiring accuracy, like engineers, accountants and pharmacists.

Tics are mostly organic... involving the brain. Some drugs will create tics, like amphetamines, and other stimulants, or disruptions of dopamine in the brain, or inflammation in the brain. Tardive dyskinesia is an example of a drug induced movement disorder that comes from antipsychotic medications.
Tourette's may also be inherited.