Evidence-based fatigue guide
Fatigue and Anxiety: How Anxiety Disorders Wear You Out
Anxiety is often thought of as a mental state, but it also has a very physical cost. Living with constant worry or a body that stays braced for danger can be genuinely exhausting, even when nothing outwardly stressful is happening. This article explains how anxiety disorders can contribute to fatigue, and how this differs from everyday stress or a passing worry.
4 min readLast reviewed:
This article is for general education only. It does not diagnose conditions or replace advice from a qualified healthcare professional.
Key takeaways
- Anxiety keeps the body in a state of physiological arousal — tense muscles, a faster heartbeat, shallow breathing — which is tiring to sustain.
- Racing thoughts and difficulty switching off can disrupt sleep, adding to daytime fatigue.
- Restlessness and exhaustion can alternate, sometimes within the same day.
- Anxiety disorders, such as generalized anxiety disorder and panic disorder, are recognized, treatable conditions.
Common symptoms
- Feeling tired despite constant restlessness or an inability to sit still
- Muscle tension, particularly in the shoulders, neck, or jaw
- Racing or intrusive thoughts that make it hard to fall or stay asleep
- Difficulty concentrating because your mind keeps returning to worries
- Irritability or feeling on edge much of the time
- Physical symptoms such as a racing heart, sweating, or an upset stomach
- Exhaustion that follows a panic attack or a period of intense worry
Possible causes
- Generalized anxiety disorder, involving persistent, hard-to-control worry about everyday things
- Panic disorder, involving repeated, sudden episodes of intense fear or physical symptoms
- Chronic worry that keeps the body’s stress response switched on for long periods
- Sleep disruption caused by anxious thoughts at night
- Overlapping life stress, such as work, health, or relationship pressures
- A personal or family history of anxiety or other mental health conditions
When a Panic Attack Needs Medical Evaluation
Panic attacks can cause chest tightness, a racing heart, shortness of breath, and dizziness — symptoms that can feel similar to a medical emergency. If you have never had these symptoms evaluated before, or if a specific episode feels different, more severe, or is accompanied by fainting, it is reasonable and appropriate to seek prompt medical assessment to rule out a physical cause before assuming it is anxiety.
Self-care guidance
These low-risk steps may help but are not a treatment plan. Speak with a healthcare professional before starting supplements or stopping medication.
- Practice slow, deep breathing or other relaxation techniques during anxious moments
- Limit caffeine, which can increase physical symptoms of anxiety and disrupt sleep
- Set aside a specific, limited block of "worry time" each day rather than letting worry spread through the day
- Keep a consistent sleep routine, and avoid screens or stimulating activity close to bedtime
- Stay physically active — regular movement can help reduce the physical tension anxiety causes
- Consider talking with a therapist, especially one who offers cognitive behavioral therapy, which is well studied for anxiety
When to see your doctor
- Worry or anxiety feels excessive, hard to control, or is present most days for six months or more
- Anxiety and related fatigue are affecting work, relationships, or daily activities
- You are having panic attacks or avoiding situations because of anxiety
- You are unsure whether what you are experiencing is anxiety, stress, or a medical issue
When to seek emergency care
Call your local emergency number or go to an emergency department immediately if you notice:
- Thoughts of suicide, self-harm, or feeling unsafe — in the United States, call or text 988 (the Suicide & Crisis Lifeline); in the UK, seek NHS urgent mental health help or call 999 if you or someone else is in immediate danger
- A specific plan or intent to harm yourself or someone else
- Hearing voices, seeing things others do not, or feeling disconnected from reality
- Chest pain, a racing or irregular heartbeat, or severe shortness of breath that does not settle, especially if this is new or unlike anything you have felt before
- Feeling unable to keep yourself safe, or a friend or family member expressing serious concern about your safety
- Severe confusion, disorientation, or an inability to care for yourself
Frequently asked questions
Why does anxiety make me tired if I feel restless?
Anxiety keeps the body in a heightened state of alertness, with tense muscles and a faster heart rate, which takes real energy to sustain. Restlessness and fatigue can happen together, especially when anxiety disrupts sleep.
Is fatigue a recognized symptom of anxiety disorders?
Yes. Fatigue is a commonly listed symptom of generalized anxiety disorder and can also follow panic attacks or periods of intense worry.
Can anxiety-related fatigue happen without obvious worry?
Sometimes. Anxiety can show up mainly through physical symptoms, such as muscle tension, sleep problems, or a racing heart, with the worry itself feeling less obvious or hard to pinpoint.
How is anxiety-related fatigue different from stress-related fatigue?
General stress is usually tied to a specific situation and tends to ease once it resolves. Anxiety disorders involve persistent, often disproportionate worry or fear that can continue without a clear trigger, and typically benefit from a more structured treatment approach.
Conclusion
Anxiety can be as physically draining as it is mentally taxing, and the fatigue it causes is a real, recognized part of the condition. If constant worry, physical tension, or panic symptoms are wearing you down, effective treatments are available, and a healthcare or mental health professional can help you find the right one.
References
Public health sources are listed in this order: USA, UK, Canada, Australia.