What should you know about paranoia and depression?

Depression may include low mood, loss of interest, hopelessness, reduced energy, sleep changes and difficulty concentrating. Some people also develop thoughts that others intend harm, are watching them or are judging them unfairly. These experiences can occur with severe depression, but they can also relate to another mental-health condition, substance use, medication effects or a medical problem. A clinician will ask about timing, sleep, mood, substances, medicines and how strongly the beliefs affect daily life.

Arrange a prompt appointment with a doctor or mental-health professional, especially when suspicious thoughts are new, worsening or disrupting sleep and relationships. Speak calmly, avoid arguing about the belief, and offer practical support such as attending the appointment. Keep a simple record of mood, sleep, medicines and substance use. Treatment may involve talking therapy, medicines, support with sleep and a safety plan tailored to the person.

Get emergency help if the person may harm themselves or someone else, cannot care for basic needs, is severely confused, hears commands to act, or has not slept and is becoming increasingly agitated. Stay nearby if safe, reduce confrontation and remove immediate hazards. If symptoms began after a new medicine, substance use or a physical illness, tell the emergency team.

Ask what could be contributing to the suspicious thoughts, whether medicines or physical checks are needed, which treatment options fit the person’s goals, and how family members can respond safely.