4. Counting
This behavior often involves obsessive counting, such as counting stairs or floor tiles while walking. This may be caused by the belief that some numbers are “lucky” and that others should be avoided. They may also believe that they, or someone else will be harmed if they don’t abide by the “rules” they have established for themselves that involve counting. Just about any activity can involve counting and there are probably as many variations as there are people with OCD.
