Depression: Symptoms, Different Patterns and Treatment Options

Depression can affect how you feel, think, sleep, eat and manage daily life. It is different from a brief low mood, but you do not need to work out the diagnosis before asking for help. It can develop after a difficult event or without an obvious trigger. Both deserve attention.

Depression is treatable. Improvement may take time and more than one approach, and needing help is not a failure of resilience or positive thinking.

Symptoms to take seriously

Symptoms vary. Some people notice sadness; others mainly notice irritability, emptiness, exhaustion or loss of interest. Common changes include:

• Persistent low mood, hopelessness or feeling worthless.
• Losing interest or pleasure in activities that normally matter.
• Sleeping much more or less than usual.
• Changes in appetite or unplanned weight changes.
• Low energy, restlessness or feeling slowed down.
• Difficulty concentrating, remembering or making decisions.
• Physical aches, headaches or digestive symptoms.
• Thoughts about death, suicide or self-harm.

For major depression, clinicians consider symptoms lasting most of the day, nearly every day, for at least two weeks, including low mood or loss of interest. This is not a rule that you must wait two weeks before seeking help. Severe distress, safety concerns or a rapid change need attention sooner.

Different forms and patterns

Major and persistent depression

Major depression involves a depressive episode that significantly affects daily functioning. Persistent depressive disorder describes a longer-lasting pattern, usually over at least two years in adults. Symptoms may vary over time; “persistent” does not mean untreatable.

Depression during pregnancy or after birth

Perinatal depression includes depression during pregnancy and after childbirth. Postpartum depression refers to the period after birth. These are more than ordinary tiredness or brief “baby blues.” Speak to a maternity or mental-health professional if symptoms are affecting you or your ability to care for yourself or your baby.

Seasonal patterns

Some depressive episodes recur with the seasons, most commonly in autumn and winter, although other patterns can occur. Tell your clinician about a recurring seasonal pattern. A specialist can discuss whether a treatment such as light therapy is appropriate; a lamp is not a universal answer for low mood.

Depression with psychotic symptoms

Severe depression can include hallucinations or delusions. This needs prompt professional assessment. Seek emergency help if there is immediate danger or the person cannot safely meet basic needs.

Depression in bipolar disorder

Bipolar disorder can include depression as well as mania or hypomania. It is important to mention previous periods of unusually high energy, reduced need for sleep or markedly changed behavior during assessment because the treatment approach differs. Read our bipolar disorder guide.

How depression can look at different ages

Children and teenagers may appear irritable, withdraw from friends or struggle with school, sleep or appetite. These changes can have several explanations, so an assessment is more useful than a label based on one behavior.

Older adults may describe physical problems, lack of emotion, memory difficulties or loss of interest rather than sadness. Depression is not a normal or inevitable part of aging. The earlier version of this article incorrectly suggested that symptoms in older adults are less severe; they can be serious at any age.

Causes are complex

Genetic, biological, psychological and environmental factors can contribute. Chronic illness, stressful experiences and some medicines may be relevant. Depression cannot be reduced to a single nutrient deficiency or a simple shortage of one brain chemical.

A clinician may review your health, medicines and substance use and consider tests for conditions that can cause similar symptoms. Do not assume unexplained physical symptoms are psychological without appropriate assessment.

What treatment may involve

Psychological therapies, medication or a combination can help. Options depend on severity, preferences, past experience and other health conditions. Cognitive behavioral therapy and interpersonal therapy are examples of evidence-based psychological treatments.

Antidepressants can take several weeks to help. Ask about expected benefits, possible side effects and follow-up. Report worsening symptoms or new suicidal thoughts promptly, particularly after starting treatment or changing a dose. Do not start, stop or change a medicine without discussing it with the prescriber.

If an initial treatment does not help enough, that does not mean nothing will work. A clinician can review the diagnosis and treatment trial and discuss other options, including specialist care or brain-stimulation treatments when appropriate. Supplements can interact with medicines and should be discussed too.

Small supports while receiving care

Choose manageable goals for meals, sleep, movement and contact with people you trust. Ask for concrete help, such as booking an appointment or getting there. Avoid judging recovery by whether you can immediately return to your usual workload.

Someone supporting a person with depression can listen, offer practical help and encourage treatment without insisting they “cheer up.” Agree on what support is welcome and take safety concerns seriously.

Questions for an appointment

• What might explain these symptoms, and is further assessment needed?
• Which treatments fit my situation and preferences?
• When should we review progress?
• Who should I contact if symptoms worsen?

Need urgent support? If you may harm yourself or cannot stay safe, get immediate help. In the US, call or text 988; call emergency services for immediate danger. Outside the US, use your local crisis or emergency service. You do not need to wait for a routine appointment.

Sources: NIMH: depression, bipolar disorder and finding mental-health support.

Editorial update: October 1, 2026. General information, not a diagnosis or individual treatment plan. This article has not been presented as clinically reviewed. Send corrections through our Contact Us page.