If random hives, brain fog, gut issues, and heart racing sound familiar… you might have Mast Cell Activation Syndrome (MCAS). Save this pin to finally understand what’s happening in your body! 👉 Click to read the full guide + symptom checklist. #MCAS #MastCellActivationSyndrome #MCASSymptoms #HistamineIntolerance #ChronicIllness #POTS #EhlersDanlosSyndrome #EDS #InvisibleIllness #Spoonie #MastCells