Thyroid Disorders: An overactive thyroid (hyperthyroidism) can increase metabolism and sensitivity to heat, resulting in ...

Mast cell activation syndrome, or disease (MCAS), is a condition that causes mast cells to release these substances too frequently, resulting in severe allergic reactions. After detecting an ...

This variant also differs from mast cell activation syndrome (MCAS), wherein ... release of mediators that cause symptoms ...

Caroline Cray was diagnosed with mast cell activation syndrome in May 2019 after repeated anaphylactic episodes Jordan Greene is Society and Culture writer-reporter at PEOPLE. She has been working ...