Signs of Mast Cell Activation Syndrome (MCAS) can affect the skin, gut, cardiovascular system, respiratory system, and nervous system. People often notice changing reactions, shifting symptoms, or flares that seem to come and go throughout the day ❤️‍🩹 These patterns stem from mast cell mediators that can influence multiple body systems at once. Tracking what shows up for you can help support clearer conversations with your care team ❤️‍🩹 Follow @Hyperresilient for clear, research-based posts