Hazardous Air Quality and Your Health: What Patients with POTS, MCAS, Autoimmune Conditions, and Anxiety/OCD Need to Know

What is happening with the air today?

The Air Quality Index (AQI) in Northeastern Ohio is at "Hazardous" levels (Code Maroon, AQI 301+). This is the most dangerous air quality category. The air contains very high levels of tiny particles (called PM2.5) and other pollutants that can affect your entire body — not just your lungs.

Why this matters more for you

If you have conditions like POTS, MCAS, autoimmune disorders, or anxiety/OCD, your body is already more sensitive to environmental triggers. Hazardous air quality can make your symptoms worse in several ways:

Your mast cells can become more reactive. Air pollution particles can cause your mast cells to release more histamine and other inflammatory chemicals than usual. This means you may experience more flushing, hives, headaches, nausea, diarrhea, shortness of breath, or brain fog — even if you are indoors. Your usual MCAS triggers may feel "louder" today.

Your POTS symptoms may flare. Air pollution directly affects the autonomic nervous system — the same system that is already not working properly in POTS. Polluted air shifts your body toward more "fight or flight" (sympathetic) activity, which can cause faster heart rate, blood pressure swings, dizziness, and worsened orthostatic intolerance. You may notice your heart racing more than usual, even with small position changes.

Your immune system may become more activated. Air pollution triggers widespread inflammation and can push your immune system into overdrive. For people with autoimmune conditions, this can mean increased joint pain, fatigue, skin flares, or worsening of other autoimmune symptoms.

Your anxiety, OCD, or rumination may get worse — and that is not "just in your head." Air pollution causes real, measurable inflammation in the brain. The tiny particles can cross into your bloodstream and affect brain areas that control mood and anxiety (like the amygdala and prefrontal cortex). Pollution also activates your body's stress response (the HPA axis), which raises cortisol and increases feelings of anxiety and dread. If you notice your OCD thoughts feel "stickier," your rumination is harder to break, or your anxiety feels more intense today — pollution may be a contributing factor. Recognizing this can help you respond with self-compassion rather than frustration.

What you can do today

- Stay indoors as much as possible. This is the single most important step. Avoid all outdoor exercise or prolonged time outside.

- Close your windows and doors. Run your air conditioning on recirculate mode if you have it. Do not open windows for "fresh air" today — the air outside is not fresh.

- Use an air purifier if you have one. A HEPA filter is ideal. Even running it in one room where you spend most of your time helps.

- Take your medications as prescribed. Do not skip your mast cell stabilizers, antihistamines, or other medications. If your provider has given you a plan for flare days, today is a day to use it.

- Stay hydrated and keep up your salt intake (if recommended by your provider for POTS). Dehydration plus pollution exposure can make POTS symptoms significantly worse.

- Limit cooking that produces smoke or fumes (frying, grilling, using a gas stove). These add to indoor air pollution.

- If you must go outside briefly, consider wearing an N95 mask — it filters out the harmful particles. A regular cloth or surgical mask does not provide adequate protection.

Managing your mental health today

- Name what is happening. Saying "my anxiety is worse because of the air quality" can reduce the power of the feeling. It is a real, physical trigger — not a personal failing.

- Limit news and social media scrolling about the air quality if it is fueling your rumination. Check the AQI once or twice, then step away.

- Use your coping tools. Grounding exercises, breathing techniques, and distraction activities are especially important today. Your brain is under extra inflammatory stress, so be gentle with yourself.

- Reach out to your support system. If your anxiety or OCD feels unmanageable, contact your therapist or provider. A bad air quality day can be a legitimate reason for a flare in symptoms.

- Maintain your routine as much as possible. Structure helps reduce rumination and gives your brain predictability during a stressful day.

When to call your provider

- Severe or unusual shortness of breath, chest tightness, or wheezing

- Fainting or near-fainting episodes

- A significant MCAS flare that does not respond to your usual rescue medications

- Anxiety or OCD symptoms that feel out of control or are causing significant distress

- Any new or alarming symptoms

The good news

Hazardous air quality days are temporary. Once the air clears, the acute inflammatory burden on your body will decrease. Your symptoms should begin to improve. In the meantime, think of today as a "rest and protect" day — your body is working harder than usual, and it deserves extra care.

The information provided in this blog is for educational purposes only and is not intended to replace professional medical advice. This information is presented for educational purposes only and should not be relied upon as authoritative. Always consult your personal healthcare providers regarding medical or mental health concerns before making changes to your care. While we strive to keep information accurate and current, healthcare knowledge and recommendations change frequently. The information on this blog should not be used to diagnose or treat any condition, and you should not start, stop, or change medications or treatments based solely on this content. Reading this blog or interacting with staff online does not create a patient–provider relationship.