OCD, like many other disorders, can be debilitating. It literally can become such a distraction that it can be paralyzing and immobilizing. So it is very important that if you even think that someone is struggling with OCD to refer them to a professional that is experienced in diagnosing and treating Obsessive Compulsive Disorder. There are so many rituals involved often in this disorder, and the thinking becomes so impaired over time, that the individual is so relieved when someone does step in or when someone does suggest, "Hey, this isn't normal. It's not normal that you can't go anywhere without doing this or without doing that. It's not normal that you can't go an hour without thinking about this. Life can be better." Also a professional can tell them it's not something that they are or are not doing that's causing this, that it's likely going to require some sort of clinical or medical intervention to get to the root of the events and the circumstances over time that have led to this development of OCD.
Expect if you have OCD that your propensity is going to be to look for something to do to get rid of it. And so subsequently, you need to get professional help. A person with OCD is prone to be very eager and somewhat impatient with the process, often wanting the therapist to tell you what exact steps to do. And if you can get them to tell you what to do, then your natural tendency, because of the OCD, is to become compulsive with that in an effort to eradicate the OCD. So getting professional help is important, but also having realistic expectations in understanding that this is a process. Although sometimes there are specific behaviors that are important for you to stop engaging in, for the most part it is a process rather than a list of actions to correct. A process takes time, and therefore is going to require commitment, patience, and willingness.
Typically it means that you experience a significant amount of racing thoughts, worrisome thoughts that become preoccupations. In and of yourself, in and of your own efforts, you have not been able to interrupt or to become distracted from or even find resolution to these thoughts - that's the obsessive part. The compulsive part suggests that you tend to engage in patterns of behaviors repeatedly in an effort to seek relief, only to find that when you've finished, your thoughts are to re-engage and continue to re-engage and continue to re-engage. Going without treatment only increases the frequency of the thoughts, the frequency of the need to engage in the behaviors and the duration. Without help, it will only get worse.