Depression: How It Is Diagnosed and What Recovery Looks Like
Depression is one of the leading causes of disability worldwide, and one of the most misunderstood. It is routinely confused with sadness, which is a normal and healthy response to loss. Depression is different in duration, in reach, and in the way it changes how a person thinks about themselves.
What clinicians actually look for
A diagnosis of a major depressive episode requires symptoms present most of the day, nearly every day, for at least two weeks, causing real impairment. At least one of the first two must be present.
- Persistently low mood
- Loss of interest or pleasure in things that were previously enjoyed
- Significant change in appetite or weight
- Sleeping too little or too much
- Fatigue or loss of energy
- Feelings of worthlessness or excessive guilt
- Reduced concentration or difficulty making decisions
- Slowed movement and speech, or agitation
- Recurrent thoughts of death or self-harm
In India and across South Asia, depression often presents physically – chronic body ache, headache, gastric symptoms, weakness – rather than as a complaint of sadness. That does not make it a different illness; it changes how it is recognised.
Things that must be excluded
Several medical conditions produce a depressive picture:
- Hypothyroidism
- Vitamin B12 deficiency
- Anaemia
- Obstructive sleep apnoea
- Chronic pain and inflammatory conditions
- Side effects of certain medications, including some steroids and hormonal treatments
- Alcohol use, which is both a cause and a consequence
A first episode usually warrants basic blood tests including thyroid function and B12.
Treatments that work
Psychotherapy
Cognitive behavioural therapy and behavioural activation have strong evidence for mild to moderate depression. Behavioural activation is deceptively simple – scheduling small, meaningful activity before motivation returns rather than waiting for motivation first. Interpersonal therapy is effective where the depression is bound up with relationships, loss or role change.
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Medication
Antidepressants, most commonly SSRIs and SNRIs, are indicated for moderate to severe depression and for milder depression that has not responded to therapy. Key points that are often not explained well:
- They take two to four weeks to begin working and six to eight weeks for full effect
- Sleep and appetite often improve before mood does
- Side effects are usually strongest in the first two weeks and then settle
- They are not addictive, but stopping abruptly can cause discontinuation symptoms, so they are tapered
- Treatment continues for at least six to nine months after recovery to reduce relapse
The choice of drug is guided by side-effect profile, other medical conditions and previous response, not by one drug being universally stronger.
Combination
For moderate to severe depression, therapy plus medication outperforms either alone.
Other options
Exercise has genuine antidepressant effect, particularly for mild to moderate illness. For severe, treatment-resistant or psychotic depression, or where there is a high suicide risk, electroconvulsive therapy remains the most effective treatment available and is far safer and more targeted than its reputation suggests.
What recovery actually looks like
Recovery is rarely a straight line. A realistic pattern is gradual improvement over weeks, with better days and worse days, function returning before mood feels normal. People commonly notice that they are doing more before they notice that they feel better.
Around half of people who have one episode will have another at some point. That is a reason to know the early warning signs – sleep change, withdrawal, loss of interest – not a reason for pessimism. Most episodes respond to treatment.
Supporting someone who is depressed
- Ask directly and listen without rushing to solutions
- Avoid advice framed as effort, such as telling someone to think positive or go out more, which lands as blame
- Help with practical, concrete tasks: booking the appointment, going along, cooking a meal
- Stay in contact even when messages go unanswered
- Take any mention of self-harm seriously and act on it the same day
When to seek help immediately
- Thoughts of ending your life, or making plans
- Inability to eat, drink or care for yourself
- Hearing voices or holding beliefs that others do not share
- Depression after childbirth with thoughts of harming yourself or the baby
Depression is treatable. The most common reason people suffer for years is not that treatment failed, but that it was never started.
This article is general health information and does not replace assessment by a qualified professional. If you are having thoughts of suicide, please speak to a doctor or someone you trust today, or contact a local crisis helpline.