Gymnast Levi Jung-Ruivivar, a former U.S. national team member who now represents the Philippines, said she suffered a “severe allergic reaction” in the Olympic Village on Monday.

Jung-Ruivivar, 18, has a tree nut allergy, but she said on Instagram that she does not believe she ingested the allergen.

“On the way to the treatment center, my allergy symptoms escalated rapidly and my breathing became significantly labored, my throat began to constrict, my chest was itching, and I had severe…