Obsessive-compulsive disorder (OCD) is a disorder in which people have recurring, unwanted thoughts, ideas or sensations (obsessions) that make them feel driven to do something repetitively (compulsions). The repetitive behaviors, such as hand washing, checking on things or cleaning, can significantly interfere with a person’s daily activities and social interactions.
Obsessions are recurrent and persistent thoughts, impulses, or images that cause distressing emotions such as anxiety or disgust. Many people with OCD recognize that the thoughts, impulses, or images are a product of their mind and are excessive or unreasonable. However, the distress caused by these intrusive thoughts cannot be resolved by logic or reasoning. Most people with OCD try to ease the distress of the obsessions with compulsions, ignore or suppress the obsessions, or distract themselves with other activities.
Compulsions are repetitive behaviours or mental acts that a person feels driven to perform in response to an obsession. The behaviours typically prevent or reduce a person's distress related to an obsession. Compulsions may be excessive responses that are directly relate to an obsession (such as excessive hand washing due to the fear of contamination) or actions that are completely unrelated to the obsession. (like folding hands in Namaskar pose thrice whenever unwanted violent thoughts come in mind) In the most severe cases, a constant repetition of rituals may fill the day, making a normal routine impossible.