OCD

Obsessive-compulsive disorder has two halves. Obsessions are unwanted thoughts, images or urges that push their way into the mind and cause real distress. Compulsions are the acts, physical or mental, done to reduce that distress or to prevent something feared. The relief they give is short, and the cycle tightens with each repetition.

Almost everybody has odd intrusive thoughts. In OCD they stick, and the person treats them as meaningful and dangerous, which is what drives the effort to neutralise them. The content is frequently the opposite of what the person values, and that is a feature of the illness. It says nothing about character and nothing about what someone would ever do.

It commonly starts in adolescence or early adulthood, runs in families, and is often set off or worsened by stress, illness, pregnancy or the months after childbirth. People typically live with it for years before mentioning it, usually from shame about the content of the thoughts. Clinicians hear these thoughts routinely and are not shocked by them.

The diagnosis is made in conversation, and your doctor will ask precise and quite private questions: what the thoughts are, how often they come, how much of the day is lost to checking, washing, arranging, counting, reassurance-seeking or silent mental rituals, and what you avoid entirely in order to keep them away.

Time is the measure they keep returning to. An hour a day is the usual threshold, and many people are surprised by the total when they add it up honestly.

They will ask what you believe will happen if you do not perform the ritual, since that belief is what treatment works on. They will also ask about family members who have been drawn into providing reassurance or into carrying out parts of the ritual, because that pattern maintains the condition and is addressed as part of treatment. Low mood, tics and alcohol use are asked about, since all three frequently accompany it. Nothing you describe is reportable to anyone.

Treatment is measured in months and works in steps. The talking treatment that works for OCD involves deliberately approaching what you fear while not performing the ritual, which is uncomfortable at first and gets steadily easier; most courses run over twelve to twenty sessions across three to six months, with daily practice between them.

Medicine for OCD is used at higher doses and for longer than for depression, and eight to twelve weeks at the full dose is the fair point to judge it. Improvement after that is often gradual over a further few months.

Most people work throughout, though someone spending many hours a day on rituals may need a period of reduced duties. The realistic goal is that the thoughts lose their grip and the rituals shrink to something manageable. Complete disappearance of intrusive thoughts is not the target, since ordinary people have them too. Treatment is continued for at least a year after you are well.