OCD has been found to be linked to the basal ganglia in the brain. The basal ganglia has been found to be overactive in persons diagnosed with OCD which has given important evidence that this disease is biological in nature and not due to environment.
People diagnosed with OCD in the world total 4-6% but this is only documented diagnosed patients. Some people have this disease and are typically labeled "constant worriers" or "worrywarts". The most proven treatment for OCD is pharmacological treatment, which might include a SSRI such as Celexa, and Cognitive Behavioral Therapy (CBT).
CBT is the number one therapy proven to help patients with OCD. OCD is also typically seen as one of the most functional mental health diagnoses once treated. A study found that most people with OCD are high functioning and excel in their jobs. OCD patients also do not experience psychotic symptoms such as hallucinations unless there is a comorbid diagnosis such as Schizophrenia. Group therapy is also a very effective tool as patients when first diagnosed or whom have recently learned they have this disorder feel alone and isolated.
If you worry more than one hour a day, have a strong urge to complete a certain task either externally or in your mind you might want to talk to a mental health professional and your primary care doctor. OCD is highly treatable and manageable. Most people have OCD the rest of their lives but have very high functioning lives and learn to cope and decrease their symptoms. Pharmacological treatment AND CBT with a mental health expert is the best proven treatment for this disorder.