What should you know about cyclical depression?

An episode may involve low mood, loss of interest, fatigue, irritability, difficulty concentrating, changes in appetite, or difficulty sleeping. Some people feel better between episodes; others have symptoms that never fully clear. Sleep disruption, stressful events, physical illness, medication changes, and seasonal or hormonal patterns may influence timing, but a recurring pattern does not establish the cause by itself.

A clinician will ask about mood, energy, sleep, functioning, substance use, physical health, and any periods of unusually high energy or reduced need for sleep. This helps distinguish depression from other mood patterns and identify related problems such as insomnia or anxiety.

Record mood, sleep, energy, concentration, irritability, daily functioning, and possible triggers over time. Keep regular sleep and wake times, maintain contact with trusted people, eat regularly, and choose manageable activity rather than waiting for motivation to return. Arrange an appointment if episodes recur or interfere with work, relationships, or self-care. Treatment may include talking therapy, practical support, medicine, or a combination chosen with a clinician.

Seek urgent help if you may harm yourself, cannot keep yourself safe, hear or see things others do not, or feel unable to care for basic needs. Contact a clinician promptly for worsening depression, severe insomnia, marked daytime sleepiness, or a sudden change in energy and behaviour. Tell someone you trust what is happening while arranging support.

Ask how your symptoms fit a mood disorder, whether physical causes or medicines should be reviewed, which treatment options suit you, how to monitor a new medicine, and what to do if your mood drops suddenly.