Obsessive Compulsive Disorder (OCD) is a type of anxiety disorder. It can be serious, but it's very treatable.
People with OCD have repeating thoughts, images or feelings that are distressing. They carry out rituals or habits (compulsions) to temporarily feel better.
OCD rituals can be obvious to other people (like checking door locks) or they can happen inside your head (like counting or trying to counteract negative thoughts with positive ones).
OCD thoughts come in all shapes and sizes, but they often revolve around things danger, dirt and contamination, or worries around sexuality or religion.
Remember: Many people like things to be a particular way and this is not necessarily OCD, where repeating thoughts, images or feelings are distressing or rituals and habits are impacting your life it is important to seek help.
You might feel:
Just because you experience one or more of these symptoms, it doesn't mean you're definitely affected by OCD, it's important to talk to your GP to get a full diagnosis.
Take the first step - if you think you are affected by OCD, talk to someone you like and trust, like a teacher, relative, counsellor or friend.
It's important not to try and manage alone, as OCD normally needs treatment to get better.
You should also see your GP. They may offer to refer you to the child and adolescent mental health service (CAMHS).
You might be offered Cognitive Behavioural Therapy (CBT) using a technique called exposure response prevention (ERP), which helps you feel less upset by your thoughts.
There are medications that can help too. Find out more about the drugs used to treat OCD.
OCD Action - a place for support and information to anybody affected by OCD (0845 390 6232)
Childline - if you're under 19 you can confidentially call, e-mail or chat online about any problem big or small (0800 1111)
There are also a variety of local CAMHS (Child and Adolescent Mental Health Service) services if you are looking for help: