The warning signs include all the above but also may include a strong, rapid heartbeat, confusion, vomiting, seizures, slurred speech, or passing out.
—
Carmel Wroth,
NPR,
2 July 2026
But that just makes the swelling worse, rapidly causing other body parts to swell—including the brain, which can cause a loss of consciousness, seizures and in some cases, death.
—
Claire Cameron,
Scientific American,
2 July 2026
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