OCD can affect the working day in ways that are not always visible. A person may spend significant time on mental rituals, checking, reassurance seeking or avoidance before, during or after work. Commuting, meetings, shared spaces, deadlines and performance reviews may all feel more demanding. The effort required to manage OCD while appearing capable can be exhausting. A guide cannot diagnose OCD or determine whether a pattern of intrusive thoughts and compulsive responses is clinically significant. Physical symptoms, medication, sleep disruption, trauma, neurodivergence and other factors can all affect a person's experience at work. New, severe or changing physical symptoms should be discussed with an appropriate medical professional. The Equality Act 2010 uses a functional test. In broad terms, a mental or physical condition may fall within the Act where it has a substantial and long term adverse effect on normal day to day activities. Whether that applies to OCD in a particular situation depends on the facts. ACAS, a union, occupational health, an employer's people team, Citizens Advice or an appropriate employment solicitor may be useful sources of role specific information. Deciding whether to tell an employer about OCD is personal. A conversation might focus on a practical need, such as a predictable appointment time, a quieter workspace, adjusted deadlines or support around a phased return after absence. Private therapy is confidential within the usual professional and legal limits. CBT with exposure and response prevention may be considered after individual assessment where OCD is affecting daily life and work. Exposure based work should be planned with a suitably qualified clinician after discussion of the rationale, alternatives, safety and pacing. A guide is not a self directed programme. For related information, see OCD therapy at https://lyceumclinic.co.uk/therapy/ocd/, the OCD comprehensive guide at https://lyceumclinic.co.uk/guides/ocd comprehensive guide/, OCD CBT tools at https://lyceumclinic.co.uk/guides/ocd cbt tools today/ and OCD rates in West London at https://lyceumclinic.co.uk/guides/ocd rates west london/. If there is immediate danger, thoughts of self harm, an inability to stay safe or a sudden marked deterioration, call 999, attend A&E or use urgent local crisis or medical support.