If you experience itching, hives, brain fog, and fatigue without being able to identify the cause, it may be linked to mast cell activation syndrome. Mast cell activation syndrome (MCAS) is an immune cell overreaction that appears to be on the rise. It causes inflammation and other distressing symptoms.
Before the COVID-19 pandemic, MCAS affected 17 percent of the general population. Some specialists believe that post-COVID, MCAS may affect up to 25 percent of the general population, with an even higher increase observed among those with chronic health conditions.
