"Am I going crazy?" When OCD symptoms change and shift to new themes

Why can OCD look so different from person to person?

Obsessive-compulsive disorder, also known as OCD, is characterised by recurring obsessions and compulsions that can function as attempts to reduce distress, create a sense of safety, or obtain relief from doubt. Almost any theme can become the focus of obsessions, avoidance or compulsions when it becomes linked with responsibility, safety, guilt or distress.

OCD is often described in terms of themes or symptom types, such as contamination fears or concerns about symmetry and order. This does not mean that a person can only have symptoms from one type of OCD, or that everyone within the same theme experiences the same difficulties. In reality, OCD can present in very different ways, even within the same symptom type. Some people with OCD have only one kind of symptom, such as checking behaviour. Others have two or more different types at the same time. For some, it varies which symptoms are present in a given period, or which symptoms are most dominant. Others may have one or a few symptom types throughout the course of their OCD. Each person’s OCD pattern is unique, and this is part of what makes OCD difficult to understand for the person living with it, as well as for relatives and clinicians.

Why do OCD symptoms change?

New symptoms sometimes emerge as older symptoms become less prominent. Sometimes “old” symptoms return, while at other times new and previously unfamiliar symptoms appear. Paradoxically, this may become clearer just as treatment begins to help. For example, the most dominant symptoms may move into the background, so the person with OCD becomes aware of smaller symptoms that were not as noticeable before. Often, this is the same OCD process attaching itself to new material: something else that can be made to feel dangerous, urgent or especially significant.

A useful way to understand this is that OCD repeatedly gives thoughts special significance, and that the things that trouble us are often connected to what matters to us. This helps explain why symptoms may change character for some people when treatment starts to help: different values are challenged when the previous symptoms are no longer as anxiety-provoking.

Symptom shifting can also be connected to major life events, and these are not necessarily negative. Symptoms can shift in connection with childbirth, a new job or falling in love, for example, but stress, loss or a death in the family can also lead to a change or worsening of symptoms.

When symptoms change, people with OCD are not always aware that the new symptoms are also part of OCD. Understandably, it can be difficult to recognise the connection when a fear suddenly appears that has never been experienced before.

A woman with a fear of accidentally poisoning her family describes it this way: “The other morning I started, as usual, with thorough handwashing before preparing breakfast. Suddenly I began to doubt whether I had touched something in the bathroom that could have exposed me to a serious infection. I think more and more about infection every day. I can hardly think about anything else… I feel like I am going crazy.”

Here, OCD targets the same values and fears in a new way - a fear of harming her family, whether through poisoning or by passing on an infection. Because the new fear appears without warning and does not obviously connect to her previous thoughts, she does not recognise it as an OCD symptom. Instead, she experiences it as a sign that she is losing her mind. Over the following days, she becomes increasingly preoccupied with infection. The thought takes up more and more space until it feels as if it will not leave her alone, and her doubt about whether she is going crazy is reinforced. A vicious circle begins: the more you try not to think a particular thought, the more you think it. In addition, when thoughts keep returning, the person with OCD may interpret that as a sign that the thoughts are true.

The example shows how OCD can shift to a new theme while still touching the same values. In this case, the value is her love for her family.

What can you do when symptoms shift?

When a new OCD theme appears, the most helpful question is not whether the new fear is true, but which pattern has been activated. For example, it can help to ask what triggers the distress, what doubt or sense of responsibility has been activated, and what checking, avoidance, seeking reassurance or other responses are being used to get relief.

As a relative, it can be helpful to support the person in recognising the pattern rather than debating whether the new fear is true or false. It is better to ask: “What is OCD pushing for right now?” and “What do we usually practise when OCD demands certainty?” That kind of support offers direction without providing repeated reassurance or feeding OCD with more certainty.

Clinically, symptom shifting rarely means that treatment has to start from scratch. Often it is about using the same principles with new symptom material: recognising the obsession, allowing uncertainty to be present and practising not carrying out the usual compulsive response.

When OCD changes theme, the task is not to solve the new thought from scratch. The key is to recognise the shift as part of the OCD pattern. The thoughts and the accompanying compulsions may change from day to day, but the principles for working with OCD are often the same: notice the obsession, allow uncertainty and practise a different response.