Thoughts about OCD usually are accompanied by stereotypical images of someone scrubbing their hands or straightening a crooked picture frame. The truth this, OCD exists in many dimensions. Contamination and symmetry are two of the better-known dimensions where people with OCD may struggle. However, they are not the only two areas that exist. Two other dimensions where OCD can reside include harm and unacceptable thoughts. Although these areas may be lesser known, they are also very common.