Short answer: Depression and anxiety symptoms overlap considerably but have distinct cores. Depression centres on persistent low mood, loss of pleasure (anhedonia), hopelessness, and reduced energy; anxiety centres on excessive worry, apprehension, and sympathetic hyperarousal. Both produce fatigue, sleep disturbance, concentration problems, and physical complaints. Symptoms must last ≥2 weeks (depression) or ≥6 months (GAD) and cause functional impairment. Validated scales: PHQ-9 and GAD-7.
Table of Contents
- Why Symptoms Overlap
- Core Depression Symptoms
- Core Anxiety Symptoms
- Physical Symptoms of Each
- Cognitive Symptoms
- Behavioural Signs
- Depression vs Anxiety — Comparison Table
- Red-Flag Symptoms
- How to Score Yourself
- When to See a Doctor
- FAQs
- References
1. Why Symptoms Overlap
Up to 60% of people with depression have comorbid anxiety and vice versa. Both involve dysregulation of serotonin, noradrenaline, GABA, and the HPA axis. The amygdala is hyperactive in anxiety; prefrontal cortex and reward circuitry are hypoactive in depression. Understanding depression and anxiety symptoms as overlapping but distinct helps guide treatment.
2. Core Depression Symptoms (DSM-5-TR)
Five or more of these during the same 2-week period, with at least one being depressed mood or anhedonia:
- Depressed mood most of the day, nearly every day
- Anhedonia — markedly diminished interest or pleasure
- Significant weight loss/gain (>5% in a month) or appetite change
- Insomnia or hypersomnia
- Psychomotor agitation or retardation observable by others
- Fatigue or loss of energy
- Feelings of worthlessness or excessive guilt
- Diminished ability to think, concentrate, or decide
- Recurrent thoughts of death or suicidal ideation
3. Core Anxiety Symptoms (DSM-5-TR GAD)
Excessive anxiety and worry on more days than not for ≥6 months, difficult to control, plus ≥3 of:
- Restlessness or feeling keyed up
- Easily fatigued
- Difficulty concentrating or mind going blank
- Irritability
- Muscle tension
- Sleep disturbance
4. Physical Symptoms of Each
Depression:
- Chronic pain, headaches, back pain
- Gastrointestinal upset — constipation most typical
- Decreased libido
- Slowed speech and movement
- Weight change
- Fatigue disproportionate to activity
Anxiety:
- Palpitations, racing heart
- Shortness of breath, hyperventilation
- Sweating, trembling
- Globus sensation (lump in throat)
- Nausea, diarrhoea, IBS-like symptoms
- Headache, muscle tension
- Dizziness, paraesthesia
5. Cognitive Symptoms
Depression and anxiety symptoms share cognitive overlap:
- Depression: negative self-talk, hopelessness, guilt, rumination about past, slowed thinking (pseudodementia in elderly)
- Anxiety: catastrophic thinking, worry about future, “what if” loops, difficulty concentrating due to intrusive thoughts, hypervigilance
6. Behavioural Signs
Depression: withdrawal from hobbies, reduced grooming, declining performance, isolation, tearfulness, substance misuse to numb.
Anxiety: avoidance, reassurance-seeking, over-planning, over-checking, carrying “safety objects,” substance misuse to calm.
7. Depression vs Anxiety — Comparison Table
| Feature | Depression | Anxiety |
|---|---|---|
| Mood core | Low, flat, empty | Fearful, apprehensive |
| Time orientation | Past (regret, guilt) | Future (worry) |
| Energy | Low | Keyed up, restless |
| Appetite | Decreased or increased | Often decreased with nausea |
| Sleep | Early-morning waking | Difficulty falling asleep |
| Thinking | Slow, negative | Racing, catastrophic |
| Behavior | Withdrawal | Avoidance |
| Autonomic | Parasympathetic shift | Sympathetic hyperarousal |
8. Red-Flag Symptoms
Seek urgent care for: suicidal thoughts with plan or intent, inability to eat/drink, catatonia, severe weight loss, psychotic symptoms (hallucinations, delusions), new-onset first panic attack with chest pain, severe agoraphobia, or substance misuse. In the US call 988; UK 116 123; India iCall 9152987821.
9. How to Score Yourself
Use the PHQ-9 (depression) and GAD-7 (anxiety). Scores of 10 or higher on either indicate clinically significant symptoms and warrant medical evaluation. Monitoring every 2–4 weeks helps track response to treatment — a 50% reduction is a response; score <5 is remission.
10. When to See a Doctor
Nutrient note: Low vitamin D, B12, and iron are common depression mimics; see which vitamin is called anti-cancer for the broader role of vitamin D in health, including mood regulation.
If depression and anxiety symptoms persist >2 weeks and interfere with work, relationships, or self-care, see your family physician / GP. They can rule out medical mimics (hypothyroidism, vitamin B12/D deficiency, anaemia, sleep apnoea, chronic infection, steroid use) and initiate evidence-based care.
Related reading: Deep-dive the anxiety side with how to tell if I have anxiety. For therapy options once diagnosed, read treatment for depression and anxiety and, if you’re in the US, treatment of adult depression in the United States.
11. External Video Resource
NIMH: Depression and Anxiety Symptoms Explained (YouTube)
12. FAQs
Q1. Can I have both depression and anxiety?
Yes — comorbidity rates reach 60%. The term mixed anxiety-depressive disorder is recognised in ICD-11.
Q2. Which comes first — anxiety or depression?
Often anxiety develops first (childhood/adolescence) and depression follows if left untreated. Not a universal pattern.
Q3. Can physical symptoms alone mean depression or anxiety?
Yes — up to 50% of patients present with somatic complaints only. “Masked depression” is common in older adults.
Q4. Do children show the same symptoms?
Children with depression often appear irritable rather than sad; anxiety in children shows as school refusal, somatic complaints, clinginess.
Q5. Are mood swings part of depression or anxiety?
Mild variability yes, but marked mood swings with periods of elation suggest bipolar disorder — needs specialist assessment.
Q6. Can thyroid problems mimic these symptoms?
Yes — hypothyroidism mimics depression; hyperthyroidism mimics anxiety. Always check TSH.
Q7. Is irritability a core symptom?
Yes — in both GAD and MDD (especially in men and children).
13. Conclusion
Recognising depression and anxiety symptoms is the first and most important step toward recovery. They are common, treatable, and highly responsive to evidence-based care. Use the PHQ-9 and GAD-7 to quantify severity, see a clinician if either score is ≥10, and remember that physical symptoms are legitimate signals — not weakness. With timely treatment, 60–70% of adults achieve remission within a year.
👨⚕️ Author: Dr Sagar Rajkuwar, ENT Specialist
MBBS, MS (ENT), Nashik, Maharashtra, India
🏥 Visit: www.entspecialistinnashik.com
📞 Mental health concerns deserve expert attention — see your family physician or a psychiatrist.
14. References
- APA. DSM-5-TR, 2022.
- WHO. ICD-11, 2022.
- Kroenke K et al. PHQ-9 validity. J Gen Intern Med 2001.
- Spitzer RL et al. GAD-7. Arch Intern Med 2006.
- NHS. Clinical depression symptoms, 2024.
- CDC. Mental Health Surveillance Report, 2024.
Medical Disclaimer: This article is for educational and informational purposes only and does not substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider regarding any medical condition or before making any decisions related to your health. Do not disregard or delay seeking professional advice based on information provided in this article.
