The symptoms are real
People with anxiety are sometimes told it is "all in your head." It is not. Anxiety is a whole-body state. The NHS lists common physical symptoms, including feeling shaky, dizzy or sweaty, headaches, stomach aches, muscle pain, dry mouth, pins and needles, tiredness, trouble sleeping, and a heartbeat that feels stronger, faster or irregular, sometimes with shortness of breath. Many people notice the body first and only later recognize the worry behind it.
Why the body reacts this way
Harvard Health Publishing explains the chain of events. When the brain perceives danger, the amygdala, an area involved in processing emotion, sends a distress signal to the hypothalamus, which works like a command center. The hypothalamus activates the sympathetic nervous system, which Harvard compares to a gas pedal. The adrenal glands release epinephrine (adrenaline), and the body changes fast:
- The heart beats faster and blood pressure rises, pushing blood to the muscles
- Breathing speeds up and the small airways open wider
- The senses sharpen and alertness increases
- Sugar and fats are released into the blood for quick energy
Harvard notes this can start before the brain has fully processed what it is seeing, which is why you can jump out of the way of a car before you think about it. If the brain keeps perceiving danger, a second system, the HPA axis, releases cortisol to keep the body on alert. When the threat passes, the parasympathetic nervous system, the brake, settles things down.
The system is built for short bursts. Cleveland Clinic explains that fight-or-flight is meant to be temporary; in hyperarousal, the response is too sensitive or stays active longer than it should. With anxiety, the alarm can fire for a worry, a memory or a sensation in the body, and the same physical changes follow even though there is nothing to fight or flee.
What common symptoms mean
Racing heart and chest tightness
Harvard notes that epinephrine makes the heart beat faster and raises pulse and blood pressure, and many people also feel tightness across the chest. For many people this is the scariest symptom, because it feels cardiac. It is also the symptom that most needs a medical check the first time, and any time it is new, different or severe.
Shortness of breath, dizziness and tingling
Anxious breathing is often fast and shallow. MedlinePlus explains that overbreathing, or hyperventilation, lowers carbon dioxide in the blood, which causes many of its symptoms: lightheadedness, feeling unable to catch your breath, a pounding heart, dry mouth, bloating, and numbness or tingling in the arms or around the mouth. The irony is that the sense of not getting enough air comes from breathing too much.
Stomach and digestion
The gut is often one of the first places anxiety shows up. The NHS lists tummy aches among common anxiety symptoms, and many people describe nausea, a "churning" stomach or extra trips to the bathroom before a stressful event.
Muscle tension, headaches and fatigue
The NHS lists muscle pain and headaches among common symptoms, and NIMH lists tension and headaches among signs of both stress and anxiety. In daily life that can mean a stiff neck, clenched jaw, tension headaches and aching shoulders. Being on alert all day is also tiring, which is why many anxious people feel exhausted by evening yet cannot fall asleep.
When the alarm stays on
Harvard describes chronic low-level stress as keeping the HPA axis activated, like a motor idling too high for too long. NIMH notes that anxiety that does not go away can affect sleep and the immune, digestive, cardiovascular and reproductive systems. This is one reason persistent anxiety is worth treating, not just tolerating.
Anxiety or something medical?
Many medical problems produce the same sensations. MedlinePlus lists medical causes of rapid breathing that include heart problems, lung disease such as asthma or COPD, infection, bleeding and some medicines, and it advises that rapid breathing for the first time may be an emergency. Cleveland Clinic says to seek emergency care for chest pain, trouble breathing or loss of consciousness. The NHS suggests seeing a doctor if you cannot tell whether shortness of breath is from anxiety.
A useful approach: get new symptoms checked, then ask your doctor which symptoms should prompt a call in the future. If testing has ruled out other causes, that knowledge becomes a tool, because you can remind yourself what your body is doing. Medical Conditions and Medications That Can Cause Anxiety or Depression covers thyroid problems, medications and other contributors.
What helps calm the body
Because the symptoms come from the nervous system, working with the body directly can help:
- Slow your breathing. Cleveland Clinic notes that slowing down to pay attention to each breath helps the body move out of fight-or-flight. MedlinePlus describes pursed-lip breathing, like blowing out a candle, and breathing from the belly rather than the chest.
- Move. Harvard notes that a brisk walk soon after feeling stressed deepens breathing and helps relieve muscle tension.
- Lean on people. Harvard describes social support as a buffer against chronic stress.
- Cut back on caffeine and protect sleep, as NIMH suggests.
These steps calm the alarm but do not always change why it keeps going off. In anxiety therapy with Dr. Lehmann, adults often work on both: practical ways to settle the body, and an insight-oriented look at the worries, history and pressures that keep the nervous system braced.