Halsey is ‘allergic to literally everything’ since giving birth and has been hospitalized multiple times

According to the Ehlers-Danlos Society site, the syndrome is a disorder “of connective tissue that are varied in the ways they affect the body and in their genetic causes.”

Sjögren’s syndrome is defined as “a chronic autoimmune condition characterized by degeneration of the salivary and lachrymal glands, causing dryness of the mouth and eyes.” Mast cell activation syndrome can cause an immediate allergic reaction including anaphylaxis, according to the American Academy of Allergy, Asthma & Immunology.

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