How to Treat POTS: What Helps Dizziness, Fatigue and Blood Pooling

Imagine standing to greet a friend and feeling your heart race as if you’ve just sprinted a hundred metres. Many people with POTS experience light‑headedness, palpitations and brain fog in everyday situations. 

This article explores what causes POTS, how to recognise its diverse symptoms and scientifically supported strategies that can ease the load. It also explains how compression garments fit into a holistic plan.

What is POTS, and why does it happen?

A disorder of the autonomic nervous system. Postural orthostatic tachycardia syndrome occurs when your heart rate increases significantly upon standing (at least 30 beats per minute for adults) without a drop in blood pressure. 

Normally, the autonomic nervous system tightens blood vessels and slightly increases heart rate when you stand to keep blood moving to your brain. In POTS, this coordination fails and blood pools in the abdomen and legs, leading to dizziness and fatigue. 

Recognising the symptoms of POTS

Symptoms vary between individuals and can fluctuate daily. Common features include:

• Rapid heartbeat on standing, the hallmark sign, is often accompanied by palpitations or chest discomfort.
• Light‑headedness or dizziness, sometimes leading to fainting.
• Neurological issues, such as brain fog, headaches and blurred vision.
• Gastrointestinal upset, including nausea, bloating or altered bowel habits.
• Fatigue and weakness, often worsening after long periods of standing.
• Temperature dysregulation and sweating abnormalities, which reflect autonomic imbalance.

If these symptoms persist for more than a few months, consult your GP for assessment. Diagnosis usually involves measuring heart rate and blood pressure lying down and standing and may include tilt‑table testing or blood tests to rule out other causes.

What causes POTS: underlying mechanisms?

Researchers believe several mechanisms contribute:

• Low blood volume. In hypovolemic POTS, limited fluid and salt in circulation reduce venous return to the heart. Increasing sodium to 3–10 g per day and drinking 2–2.5 litres of water can help expand blood volume.
• Neuropathic dysfunction. Damage to small nerve fibres controlling blood vessel tone may impair vasoconstriction, causing blood to pool.
• Hyperadrenergic state. Excess norepinephrine release increases heart rate but doesn’t adequately constrict blood vessels.
• Autoimmune triggers and hormonal shifts. Conditions like Sjögren’s syndrome or events such as pregnancy or puberty may alter autonomic regulation.

Treatment of POTS: lifestyle changes first

There is no cure for POTS, but many people improve with non‑drug interventions. These strategies address the physiology described above.

Fluid and salt loading

Dehydration and low sodium can worsen POTS symptoms. Clinical guidelines recommend drinking 2–3 litres of water daily and increasing salt intake to 10–12 g per day. Sodium helps the kidneys retain water, expanding blood volume and preventing rapid heart rate. Practical sources include electrolyte drinks, broths, olives and pickles. People with hypertension or kidney disease should check with their doctor before increasing salt.

Eating patterns

Large meals divert blood to the digestive tract, leaving less for your brain and heart. Eating smaller, more frequent meals with complex carbohydrates and fibre may reduce post‑meal tachycardia. Avoid refined carbohydrates and high‑sugar snacks; they can cause blood sugar spikes that mimic or worsen POTS symptoms.

Compression garments: how they help

Medical‑grade compression stockings or leggings compress the legs and abdomen to push blood back toward the heart. This reduces venous pooling and helps maintain blood pressure on standing. Studies suggest waist‑to‑ankle garments with pressures of 20 mmHg or higher provide the most benefit. For everyday wear or travel, knee‑high socks or tights can still be helpful, particularly during long periods of sitting. Compression gear may also relieve heavy legs. 

Graded exercise and movement

Long periods of bed rest lead to muscle deconditioning and worsening POTS. Reclined aerobic exercise (such as swimming, rowing or recumbent cycling) and gradual progression to upright activities. Isometric exercises like leg squeezes can be performed in bed to activate muscles and push blood upward. Start with short sessions based on your tolerance and slowly increase duration; using a heart rate monitor can help avoid overexertion.

Avoiding triggers and practical tips

Heat, prolonged standing, alcohol and caffeine can trigger symptoms. To manage these triggers:

• Raise the head of your bed by 6–10 inches to maintain blood volume overnight.
• When feeling dizzy, lie down or cross your legs and clench your muscles to stimulate venous return.
• Avoid hot showers or saunas; use cooling vests during summer.
• Maintain consistent sleep and meal schedules.
• During menstrual periods, be prepared for symptom flares and intensify salt and compression routines.

Monitoring vital signs and keeping records

Tracking your pulse and blood pressure helps you and your clinician fine‑tune treatment. Recording these values daily, especially when adjusting therapies.

Pharmacological options

If symptoms persist despite lifestyle changes, doctors may prescribe medications off‑label. These drugs aim to increase blood volume, constrict blood vessels or slow the heart. Evidence is limited, and medications should be started under specialist supervision.

Mineralocorticoids and antidiuretics

• Fludrocortisone helps the body retain salt and water, increasing blood volume. It may relieve hypovolemic POTS but can cause hypertension, low potassium and fluid retention. 
• Desmopressin, an antidiuretic peptide, improves water reabsorption in the kidneys; a small crossover trial showed it reduced standing heart rate and symptoms. Because of the risk of hyponatraemia, close monitoring is essential.

Vasoconstrictors and cholinesterase inhibitors

• Midodrine activates alpha‑1 receptors to tighten blood vessels. A double‑blind crossover study found it improved orthostatic tachycardia by increasing peripheral vascular resistance. Side‑effects include tingling, anxiety or supine hypertension. 
• Pyridostigmine, a cholinesterase inhibitor, enhances neurotransmitter activity and can reduce heart rate without lowering blood pressure; diarrhoea is a common adverse effect.

Beta‑blockers and heart‑rate modulators

• Low‑dose propranolol slows heart rate and improves symptoms; a crossover trial showed better control at 20 mg compared with placebo. Higher doses may cause fatigue or low blood pressure. 
• Ivabradine selectively slows the sinus node without affecting blood pressure; retrospective data show reductions in palpitations and light‑headedness. Your clinician may also consider selective serotonin reuptake inhibitors or other heart medications depending on individual features.

When to seek help and safety considerations?

See your GP if you experience persistent dizziness, fainting, chest pain or if symptoms significantly limit your daily activities. Emergency care is warranted if fainting leads to injury or if you have severe chest pain that could indicate heart disease. Pregnant people, those with cardiovascular or kidney conditions and anyone taking multiple medications should consult their clinician before making major dietary or exercise changes or using compression garments.

Conclusion

You now understand that POTS involves dysregulated heart‑rate responses due to autonomic dysfunction. By focusing on hydration, salt loading, compression wear, gentle exercise and avoiding triggers, many people can lessen symptoms and reclaim daily activities. 

Speak with your GP about appropriate compression garments and any medications you might need. Taking proactive steps, tracking your vital signs, making lifestyle changes and seeking professional guidance offer the best chance of living well with POTS.

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Frequently Asked Questions

What does “orthostatic intolerance” mean?

Orthostatic intolerance refers to symptoms (dizziness, rapid heart rate, fainting) that occur when standing upright due to inadequate blood flow to the brain. In POTS, this is caused by an exaggerated heart rate increase without a drop in blood pressure.

Is POTS permanent?

POTS often fluctuates over time. Some people recover within a few years, especially after illness‑related onset. Others experience chronic symptoms but can manage them through lifestyle adjustments and occasional medication. A tailored plan with your GP improves the outlook.

Why do hormones affect POTS symptoms?

Hormonal changes during menstruation, pregnancy or menopause can influence blood volume and sympathetic tone. Many women notice symptom flares around their periods and may need to adjust salt or compression routines.

Is POTS related to long COVID?

Post‑viral dysautonomia is recognised as a trigger for POTS; some people develop symptoms after COVID‑19 infections. Ongoing research aims to understand this link. If you suspect long COVID‑related POTS, talk to your clinician.

Can children develop POTS?

Yes. Although POTS is more common in adolescents and young adults, children can develop it. Treatment principles are similar, but paediatric specialists should guide care.

Does POTS increase the risk of blood clots?

POTS itself doesn’t directly cause clots, but prolonged immobility and blood pooling can contribute to sluggish circulation. Compression garments and regular muscle contractions help maintain venous return and may lower the risk.