I suffer from POTS like Christina Applegate's 13-year-old daughter. Here's what it's like living with the chronic and debilitating illness

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Christina Applegate's daughter, Sadie LeNoble, was recently diagnosed with Postural Orthostatic Tachycardia Syndrome (POTS). In a recent episode of MeSsy, a podcast co-hosted by Applegate and actress Jamie-Lynn Sigler, the 13-year-old spoke about her experience with the condition.

“I have something called POTS,” LeNoble said. “I have no clue what it actually is, but it’s something to do with the autonomic nervous system and it affects my heart. When I stand up, I get really, really dizzy, and my legs get really weak, and I feel like I’m going to pass out. And I have fainted before — I have gone unconscious — but that doesn’t usually happen. That’s only on really bad days.”

Although she was diagnosed a few months ago, LeNoble recalls feeling sick as early as the sixth grade, and said the school nurse allegedly dismissed her symptoms as “just anxiety” or an attempt to “get out of class."

“I genuinely felt so sick, and I was in a lot of pain, and them not doing anything about it definitely hurt me physically and emotionally," she said. "Because I was just like, ‘This is rude. I feel sick and you’re telling me to go to PE and run laps around the football field. I can’t do that.’”

Like LeNoble, I live with POTS. Although neither LeNoble or Applegate shared what precipitated her diagnosis, my journey with POTS began when I contracted COVID-19 in early 2023.

While the majority of COVID patients resolve their symptoms in a matter of weeks, mine got worse over time. I knew something was wrong when one day I almost blacked out in the shower. I felt dizzy, nauseous and my feet turned a deep purple in colour.

After a slew of doctors, cardiologists and rheumatologists, I was told I had POTS.

It's been more than four years since March 11, 2020, when the World Health Organization declared a global pandemic. According to Health Canada, long COVID also known as post-COVID-19, affects everyone differently and there have been reports of over 100 symptoms. Many, like myself, have been diagnosed with new illnesses as a consequence.

But what is POTS, and how does it affect my life? Here's everything you need to know.

What is POTS?

POTS, or postural orthostatic tachycardia syndrome, is a condition that causes a variety of symptoms when transitioning from lying down to standing up, such as dizziness, fatigue and rapid heart rate.

Normally, your body's autonomic nervous system balances your blood pressure and heart rate to keep your blood flowing properly throughout your body, no matter what position you're in.

But if you have POTS, your body does not automatically balance your blood vessels and heart rate. As a result, blood pressure and heart rate can dramatically change.

Since blood is not being properly pumped to your brain, it can also pool in your legs, causing your feet and legs to change colour.

You can get POTS after getting an infection, condition or disease like COVID, diabetes, Lupus or Lyme. It could also develop after contracting anything else that attacks your autonomic nervous system.

My diagnosis amid long COVID

Other than nearly blacking out while showering, my first major symptoms of POTS were extreme fatigue and lightheadedness. I was essentially couch-ridden, and every time I tried to stand up, I'd get a head rush and the room would spin.

Basic tasks like cooking or making my bed became a challenge, and my mental health became severely affected. My doctor told me my symptoms were just anxiety, but I knew it was something more.

As a desperate attempt to seek help, I joined Cornerstone Physiotherapy's online Long COVID clinic, which also specializes in POTS in the Greater Toronto Area.

My specialist suspected I had POTS due to my predominant symptoms. To make sure, he had me test my heart rate while lying down and then standing up with my Apple Watch.

When transitioning from lying down to standing up, my heart rate would increase by at least 50 beats per minute. For context, the average person's heart rate should increase by only 10-15 beats. To qualify for POTS, your heart rate has to increase by at least 30 beats per minute when transitioning from lying down to standing up.

I was sent to a rheumatologist to check my autoimmune system, and then a cardiologist to examine my heart. From those appointments, it was clear that I had COVID-induced POTS.

A recent international survey indicated that roughly 67 per cent of COVID long-haulers have some form of nervous system dysfunction post-infection, and 30 per cent qualify for POTS.

How does POTS affect my life?

Each case of POTS is different, but for me, everyday life now requires organization and planning.

Due to my fatigue and symptoms, alongside my treatment plan, I'm only allowed to burn a certain amount of calories per day, and I cannot stand for long periods of time.

Considering this, I can no longer make tea, do my hair and makeup or eat breakfast all while standing up in the morning. I either have to sit down to do these tasks, or take breaks in between. If I have a social event to go to, I have to rest the day before, the hours before the event and the entire day after.

At the present moment, I have to lie down for at least 15 minutes every hour, consume at least 5,000mg of salt per day to keep my blood pressure up, drink almost three litres of fluids per day to increase blood volume and wear compression pants to prevent blood pooling.

Heat can also trigger my dizziness, so I've spent most of the summer inside. This is extremely frustrating when all of my friends and family are out enjoying the sun and participating in fun activities without me.

But despite my heartbreak, I'm trying to remain hopeful. Many people with POTS can see symptoms come and go over time. I have a great medical team behind me, and adjustments in diet, physical activity and medication can improve my quality of life.

Most importantly, my support system, including family, friends and colleagues, helps lift me up on down days and reminds me that I'm more than my condition. I'm more than my health. And I won't let POTS take over my life.

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