POTS and Dysautonomia in Phoenix: A Guide to Symptoms and Evaluation

POTS and dysautonomia can be difficult to explain because symptoms may change from one hour to the next. A person may feel lightheaded after standing, notice a racing heartbeat in the shower, or feel wiped out after a normal errand. Those symptoms are real, and a careful neurologic evaluation can help create a clearer plan.

Center for Neurology and Spine provides adult neurology care for people in Phoenix who have concerns about POTS, dysautonomia, dizziness, fainting, and related symptoms. This guide explains what to notice, how an evaluation may work, and when to seek urgent help.

What are POTS and dysautonomia?

The autonomic nervous system helps manage body functions that happen automatically: heart rate, blood pressure, temperature regulation, digestion, sweating, and more. Dysautonomia is an umbrella term for conditions that affect this system.

Postural orthostatic tachycardia syndrome, often called POTS, is one form of dysautonomia. Symptoms are commonly triggered or made worse by standing. People may notice a fast heart rate, dizziness, feeling faint, shakiness, nausea, brain fog, fatigue, or trouble tolerating heat.

These symptoms can look different from person to person. They also can overlap with other medical concerns. That is why it is important to receive an individualized assessment instead of trying to self-diagnose from a checklist.

Common symptoms to discuss with a neurologist

Consider a neurologic evaluation if you regularly experience lightheadedness when standing, near-fainting or fainting, palpitations with upright activity, unusual heat intolerance, fatigue that does not match your activity level, difficulty concentrating, nausea or digestive changes, tremulousness, sweating changes, or symptoms that improve after lying down.

Keep a symptom diary for a week or two before your visit. Note the time of day, your activity, hydration, meals, sleep, medications, and what helps or worsens symptoms. In Phoenix, hot weather and dehydration can make symptoms feel stronger, so including those details is especially useful.

What can cause similar symptoms?

A fast heart rate or dizziness is not automatically POTS. Symptoms can be related to dehydration, anemia, medication effects, infections, thyroid concerns, heart rhythm conditions, sleep problems, anxiety, migraine, and many other issues. A thorough history and appropriate testing help your care team consider the full range of possibilities.

What happens during a POTS or dysautonomia evaluation?

Your visit begins with your health history and a description of your symptoms. Your neurologist may ask about when symptoms began, whether they followed an illness or other change, your daily activity, sleep, medications, family history, and any fainting episodes.

The evaluation may include a neurologic examination and measurements of heart rate and blood pressure in different positions. Depending on the situation, your clinician may recommend autonomic testing, laboratory work, coordination with other specialists, or other studies. Not every patient needs the same testing, and recommendations should match the symptoms and medical history.

Preparing for your appointment

Bring a list of medications and supplements, records from recent evaluations when available, and your symptom diary. It can also help to bring questions about daily routines, work, exercise, hydration, and heat exposure. A family member or friend may be helpful if symptoms make it hard to remember details of the visit.

Simple day-to-day strategies may be discussed as part of a broader plan. Your clinician can advise you on choices that are appropriate for your individual health history. Do not make major medication, salt, fluid, or exercise changes without guidance if you have heart, kidney, blood pressure, or other medical conditions.

Living with symptoms that vary

Fluctuating symptoms can be frustrating. A good care plan often focuses on patterns rather than a single difficult day. Small, practical goals—such as tracking triggers, planning errands around times when you feel steadier, or discussing a gradual activity plan with your care team—can make the next steps more manageable.

It also helps to be specific when describing symptoms. Instead of saying “I feel bad,” note whether you feel spinning, lightheaded, weak, short of breath, nauseated, foggy, or close to fainting. Those details help your neurologist understand which systems may be involved.

When to seek urgent care

Call 911 for chest pain, severe shortness of breath, fainting with an injury, new weakness or numbness on one side of the body, facial drooping, trouble speaking, a severe sudden headache, or new confusion. These symptoms can signal an emergency and should not wait for a routine neurology appointment.

Frequently asked questions

Can POTS symptoms come and go?

Yes. Symptoms may vary with standing, heat, hydration, sleep, illness, meals, menstrual cycles, stress, and activity. A pattern over time is more informative than one isolated episode.

Is POTS only a heart problem?

POTS involves the autonomic nervous system, which regulates many automatic body functions. A coordinated evaluation may involve different parts of your healthcare team depending on your symptoms.

Will I need autonomic testing?

Your neurologist will decide whether testing is appropriate after reviewing your history and examination. Testing is useful when it will answer a specific clinical question.

Can Phoenix heat make symptoms worse?

Heat and dehydration can make dizziness and fast heart rate more noticeable for many people. Discuss safe, personalized strategies with your clinician.

Talk with a Phoenix neurologist about POTS and dysautonomia

If standing-related dizziness, racing heart, fainting, or ongoing fatigue is disrupting your life, a neurologic evaluation can help identify the next right step. Center for Neurology and Spine serves adults in Phoenix. Call 623-257-6038 or visit www.cnsofaz.com to request an appointment.

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