MCAS Fun Facts #9
Heat, cold, pressure, vibration, or friction can activate mast cells, not just foods or chemicals.
Yep. These are physical triggers. Not allergens. Not toxins. Just… physical things that affect your biology. And mast cells are very sensitive to physics.
Mast cells sit right at your body’s borders. Skin. Blood vessels. Gut lining. Airways. They are built to detect environmental change. They have receptors that respond not only to chemical signals but also to temperature shifts, mechanical stress, stretch, shear force and nerve signaling.
My mast cells very much dislike pressure. So any clothing that is tight or restrictive, really bothers me. This is complicated, because I also have POTS. And one thing that helps with POTS is compression garments. I struggle to choose between wearing compression gear to help the POTS, but inevitably aggravating my MCAS. Or forgoing compression and aggravating the POTS symptoms further. It’s a real blast. 💥
Pic is from when I had the audacity to wear shoes for a short period of time. The pressure the shoe/sock put on my heel causes a reaction. 🎉😑 #mcas #mastcellactivationsyndrome #chronicillness #funfacts #foryoupage
In my experience living with Mast Cell Activation Syndrome (MCAS), I've learned that it's not just allergens or chemicals that can spark a reaction. Physical triggers like heat, cold, pressure, vibration, and friction play a surprisingly big role in activating mast cells. These cells are located at the borders of our body—skin, blood vessels, gut lining, and airways—making them highly sensitive to changes in the environment. For instance, the pressure from tight clothing or even shoes can cause intense discomfort or flare-ups. One challenge I face is balancing MCAS with Postural Orthostatic Tachycardia Syndrome (POTS). Compression garments can help manage POTS symptoms, but they often increase pressure on my skin and tissues, triggering my mast cells and worsening MCAS symptoms. It becomes a difficult trade-off, showing how interrelated chronic illnesses can be. Aside from clothing, exposure to temperature extremes also triggers reactions. Sudden cold or heat can activate mast cells, causing symptoms ranging from itching and swelling to more severe systemic responses. This sensitivity to physical stimuli makes daily life unpredictable. A practical tip I’ve found helpful is choosing softer, more breathable fabrics that reduce pressure and friction on sensitive skin areas. Also, pacing activities to avoid excessive vibration or mechanical stress helps reduce flare-ups. Listening carefully to my body’s responses has been invaluable in managing this condition. Understanding that mast cells respond not only to chemicals but also to physical forces broadens the approach to managing MCAS. It’s essential for patients and caregivers to recognize these triggers to create more effective symptom management plans and improve quality of life.
