POTS: Symptoms, Diagnosis, and Management

POTS is a long-term disorder that affects the body’s automatic control system. This system helps control heart rate, blood pressure, sweating, and body heat.

POTS causes an excessive rise in heart rate during upright posture^1,4. It occurs without the large blood pressure drop seen in orthostatic hypotension^1,4.

Orthostatic intolerance means symptoms start while upright and ease after lying down^5,9. This guide reviews POTS symptoms, diagnosis, tests, and treatment choices.

POTS involves a fast pulse on standing^1,4. For this reason, a careful medical review is important.

POTS stands for postural orthostatic tachycardia syndrome⁷. It is a chronic disorder that can affect many body systems^1,4.

The main feature is a fast normal heart rhythm while upright¹. This heart rate change occurs with frequent symptoms of orthostatic intolerance^1,4.

Symptoms often improve quickly after returning to a lying position^1,6. The pattern may come and go over months or years^5,7.

Standing shifts blood toward the lower body. The body normally tightens blood vessels to keep blood moving toward the heart and brain^7,8.

With POTS, the body cannot balance blood vessel tightening and heart rate response^7,8. Blood may then collect in the legs and lower body.

Less blood may return to the heart and brain. The nervous system may release more stress hormones to support blood flow.

These hormones can make the heart beat faster. They may also cause pounding heartbeats or shakiness.

POTS mainly affects females, with cases peaking from ages 13 through 29. Other reviews report a strong pattern among adolescent girls and young women^1,3.

The true number of affected people remains uncertain. Estimates of POTS frequency among people with long COVID remain uncertain^1,4.

POTS can place major limits on daily life^1,4. It may reduce participation in school, work, exercise, and social activities^1,4,8.

Researchers view POTS as a mixed disorder with several possible mechanisms^2,3. More than one mechanism may affect the same person.

Possible mechanisms include:

These patterns can overlap and interact. They do not divide all cases into clear groups.

Some people report symptom onset after infection, surgery, injury, or pregnancy^3,5. One review linked infections with recent onset in 30% to 40% of cases.

These reports show a link in timing, not proof of cause. POTS may begin quickly or develop over time⁷.

Reported related conditions include migraine and joint hypermobility^1,2. Ehlers-Danlos syndrome has also been linked with POTS^1,2.

Ehlers-Danlos syndrome affects the body’s connective tissues. Other reported links include irritable bowel syndrome and some immune system diseases⁶.

Recognizing related conditions can help improve care for people with POTS^2,6. Its presence does not replace the standard POTS diagnostic criteria^1,6.

POTS can cause a range of symptoms^2,4. They often worsen with sitting or standing and improve after lying down^1,7,8.

The type and strength of symptoms differ between people^4,7. Symptoms may also come and go over time^5,7.

Common upright symptoms include:

Fainting is not required for a POTS diagnosis^1,3. Many people report lightheadedness without losing awareness^1,2.

Fatigue is common and may be severe or long lasting. Reduced exercise tolerance can also limit physical activity^2,4.

Possible brain and whole-body symptoms include:

POTS symptoms can reduce school or work performance^1,4. They can also lower general quality of life.

Digestive problems can occur with POTS^2,4. They are not required for diagnosis^1,6.

Reported digestive and bladder symptoms include:

Tell your clinician which symptoms cause the greatest limits. This can help guide the care plan.

Several settings may make POTS symptoms worse:

A simple diary can help reveal patterns. Record posture, activity, meals, drinks, and symptom timing.

No single symptom confirms POTS. Clinicians compare symptoms, pulse changes, blood pressure, and possible other causes^1,4.

Consensus criteria require all the following points:

Orthostatic hypotension is a large blood pressure drop after standing. It means a fall of at least 20 systolic or 10 diastolic millimeters of mercury^1,4.

Systolic pressure is the top blood pressure number. Diastolic pressure is the bottom number.

The heart rate increase must stay present during repeat readings¹. One review requires two qualifying readings at least 1 minute apart¹.

An active standing test checks heart rate and blood pressure after standing. One review suggests checks at 2, 5, and 10 minutes².

The clinician compares these results with readings taken while lying down. Symptoms of orthostatic intolerance can also occur with orthostatic hypotension^1,8.

A heart rate change alone does not confirm POTS^1,8. The full symptom pattern and other diagnostic rules must also fit^1,4.

A tilt-table test may help when the diagnosis remains unclear^5,6. The person lies on a table and is secured in place^5,8.

The table then moves toward an upright position^5,8. Staff track heart rate and blood pressure during the position change^5,8.

Heart rate responses may vary by day and time¹. If suspicion remains high, a later test may be useful¹.

The first steps include a health history and physical exam^2,3. A clinician also reviews medicines, supplements, sleep, diet, exercise, and recent illness^2,3.

An ECG checks the heart’s electrical signals. It forms part of the first medical review^3,6.

Blood tests may check for other causes, including:

Some medicines can raise the heart rate^1,3. Examples include stimulants, diuretics, and certain antidepressants^1,3.

Further heart tests depend on the history and exam. Options may include a heart monitor, ultrasound, or exercise test^2,3,6.

Autonomic nerve tests may also help in selected cases^6,7. These tests can assess sweating, breathing responses, or blood pressure control^6,7.

POTS symptoms vary, and treatment can involve different approaches^2,7,8. Care often starts with an ECG and blood tests to look for other causes of symptoms^4,6.

First-line care may include these measures:

Fluid and sodium goals should match your health needs. Medication may not be right for everyone^7,8.

Ask your clinician to set safe goals. Do not start or stop prescribed medicine without medical guidance.

Practical planning may also help. You can plan seated breaks and reduce time spent in hot settings.

Structured exercise may improve upright tolerance and physical function^4,5. However, exercise intolerance can make standard plans hard at first^5,7.

A supervised plan may begin with reclined activities^4,7. Suitable starting choices may include:

Activity should start slowly and rise based on tolerance^7,8. A fixed schedule may not account for symptoms that appear shortly after sitting up or standing.

Some clinicians use heart rehabilitation methods for gradual conditioning⁷. If symptoms stay worse after exercise, discuss the plan with the supervisor.

A clinician may consider medicine when lifestyle steps do not provide enough relief^4,6. The choice depends on symptoms, blood pressure, and other findings^2,4.

Possible medicine choices include:

Few studies have explored whether treating MCAS resolves POTS symptoms^2,4. Few large, controlled trials have tested these choices.

Each medicine requires a review of likely benefits and risks. Ask your prescriber what side effects need attention.

Never change the dose on your own. Speak with the prescriber before starting or stopping any medicine⁵.

POTS can affect work, school, exercise, and daily tasks^1,4,8. Treatment can improve symptoms and function for many people^1,4.

A written log can make follow-up visits more focused. Useful details to track include:

Bring the log to each follow-up visit. It can help you discuss patterns and treatment goals.

Symptoms can limit school or work participation^1,4. Ask your care team about support for daily duties.

Useful goals may include longer standing time or a gradual return to activities. Progress can vary because symptoms may come and go^5,7.

If worry or low mood affects daily life, tell your clinician. Emotional support can form part of a broader care plan.

Care may involve your main doctor and a specialist^1,5. A POTS specialist may be part of the care team^5,7.

Arrange a medical visit if upright symptoms keep returning⁵. This is especially important when lying down brings relief⁵.

A clinician can check heart rate, blood pressure, medicines, and other possible causes^1,5. Do not assume every fast pulse is POTS.

Anemia, dehydration, infection, thyroid disease, and medicines can cause similar findings^1,4. Heart or lung disease can also cause sinus tachycardia.

Ask about further assessment if symptoms continue and POTS is still suspected¹. A repeat standing test may help when suspicion remains high¹.

Book a follow-up if current treatment is not helping. The plan may need changes in exercise, lifestyle steps, or medicine^4,6.

Recognizing related health problems can help improve POTS care^2,6. Your main doctor can begin POTS care, with specialists involved when needed^1,5.

Learning about POTS can support better talks with your care team. Diagnosis requires lasting upright symptoms and a set heart rate change^1,4.

Clinicians must also exclude a major blood pressure drop and other causes^1,4. This helps avoid confusing POTS with other reasons for a fast pulse.

No single plan fits every person^2,7. POTS care can begin in primary care and improve symptoms and function^1,4.

Regular review keeps care linked to your symptoms and goals. Tailored treatment can improve daily function and quality of life^1,7.