Quick answer
Physical symptoms of anxiety include a fast heartbeat, shortness of breath, headaches, dizziness, stomach upset, muscle tension, sweating and poor sleep. They happen because your body is reacting as if something is wrong, even when nothing dangerous is happening. They are common and usually not harmful in themselves, but it is sensible to mention them to your GP, especially if they are new, persistent or worrying you.
Why anxiety shows up in your body
Anxiety is not only a feeling in your head. When you sense a threat, your body prepares to deal with it, often called the "fight or flight" response. Your heart speeds up, your breathing changes and your muscles tense.
That response is useful if you need to step out of the way of a bus. It is less helpful when it switches on during a busy week, a worrying thought or a quiet moment at night. If it keeps happening, your body can feel on edge much of the time.
This is why many people first notice anxiety as a physical problem, such as a racing heart or a knotted stomach, and only later link it to worry or stress.
15 physical symptoms of anxiety, by body area
The NHS lists many of the symptoms below as possible signs of anxiety. Not everyone gets all of them, and you might notice only one or two.
| Body area | Symptoms you might notice |
|---|---|
| Heart and breathing | 1. A fast or pounding heartbeat<br>2. Shortness of breath<br>3. A tight feeling in your chest |
| Head and senses | 4. Headaches<br>5. Dizziness or light-headedness<br>6. A dry mouth<br>7. Pins and needles |
| Stomach and gut | 8. Stomach ache<br>9. Feeling sick<br>10. A churning or "butterflies" feeling |
| Muscles and skin | 11. Muscle aches and tension<br>12. Trembling or shaking<br>13. Sweating more than usual |
| Energy and sleep | 14. Feeling tired or drained<br>15. Trouble falling or staying asleep |
A few notes on reading this list:
- Symptoms often cluster. A busy mind at night, a tight jaw and a headache the next day can all be connected.
- They can come and go. Some people notice them mostly in certain situations, such as before work or social plans. Others feel them in the background most days.
- Many things can cause these symptoms. Illness, tiredness, hormones and many other things can cause the same signs. A list like this cannot tell you the cause, and a GP can help you rule out other explanations.
If you are not sure whether what you are feeling might be anxiety, a free and private mental health screening on Mindhelpa can be a calm first step. It covers anxiety, depression, ADHD, burnout and more. It is not a diagnosis, but it can help you put your experiences into words before you talk to someone. Optional reports and consultations are there if you want them, and you can stop at any point.
Steps to try when your body feels anxious
These are general ideas for easing the moment. They are not a treatment, and they will not suit everyone.
- Slow your breathing. Breathe in gently through your nose, then out slowly through your mouth. Longer out-breaths can help your body settle. Stop if you feel light-headed.
- Ground yourself. Name five things you can see, four you can touch and three you can hear. This brings your attention back to the room.
- Loosen your muscles. Drop your shoulders, unclench your jaw and relax your hands.
- Move a little. A short walk can give your body somewhere to put the extra energy.
- Note what was happening. A short note on your phone about when symptoms appeared can show patterns over time. It is also useful to show your GP.
- Look after the basics. Regular meals, water and a steady bedtime can all affect how your body feels. If you drink a lot of caffeine, notice whether it makes your symptoms worse.
If these steps do not help, or the symptoms keep returning, you do not have to manage alone.
When to mention physical symptoms to your GP
You do not need to wait until things feel unbearable. It is reasonable to make an appointment if:
- the symptoms are new and you do not know why
- they keep coming back or have lasted for weeks
- they are getting in the way of work, sleep, relationships or daily life
- you are avoiding places or activities because of how your body feels
- you are worried that something else is going on
- you also feel low, hopeless or constantly on edge
Seeing your GP also lets someone check for other possible causes of your symptoms, which can give you peace of mind either way. If you are unsure how to start the conversation, our guide on how to talk to your GP about depression or anxiety includes a simple script.
Bring this with you to your appointment:
- a list of the symptoms you have noticed
- when they started and how often they happen
- anything that seems to make them better or worse
- how they affect your sleep, work and daily life
- any questions you want to ask
If you are taking any medicines or supplements, or wondering about treatment options, speak to your GP or pharmacist. Do not change anything without asking them first.
Anxiety and low mood can overlap, and you might notice both. If you are unsure which fits better, our article on how to tell the difference between depression and sadness may help.
If you would like to check in with yourself first, the free and private Mindhelpa screening is available whenever you are ready. It is not a diagnosis, but you can take the results to your GP if you choose to.
When to get urgent help
If you or someone else is in immediate danger, call 999 or go to A&E. NHS 111 (England, Scotland and Wales) for urgent medical advice. Samaritans: call 116 123 (free, 24 hours). SHOUT: text 85258. In Northern Ireland, contact your GP or call Lifeline on 0808 808 8000. This article is general information, not a diagnosis or a substitute for professional care.
Frequently asked questions
Can anxiety cause physical symptoms even if I don't feel worried?
Yes, it can. Anxiety can show up in the body, and some people notice the physical side first. If you have symptoms and cannot find a reason, your GP can help look into the cause.
How do I know whether it is anxiety or a physical health problem?
You cannot always tell by yourself, because many conditions share the same symptoms. A GP can ask about your symptoms and your health, and arrange checks if needed. Do not ignore sudden or severe symptoms, particularly chest pain or severe breathlessness. Use the urgent help section above.
How long do the physical symptoms of anxiety last?
It varies from person to person. Some people feel symptoms for a short time in stressful moments, while others notice them on and off for longer. If they are lasting or affecting your life, mention them to your GP.
Does the Mindhelpa screening diagnose anxiety?
No. The screening is free and private, but it is not a diagnosis. It can help you reflect on how you have been feeling and decide whether to talk to a GP or another professional. Only a qualified health professional can diagnose a condition.