Obsessive-compulsive Disorder (OCD) is one of the anxiety disorders. One in fifty people would have the chance of suffering from OCD in their lifetime and the ratio of male to female patients is equal. Many children have mild ‘obsessive’ behaviours such as tidying up their toys very carefully or avoid stepping on the gaps on the streets, but usually these behaviours would disappear when they grow up. OCD in adulthood usually has onset in adolescence or early twenties, and usually male patients have earlier onset compared to female ones. The severity of symptoms may vary with time, but many patients only seek help after years of onset of symptoms.

You can refer to the following website.

What is Obsessive-compulsive Disorder (OCD)?

The source of information is provided by the Hospital Authority Castle Peak Hospital