Billie Eilish performs at Avicii Arena on April 23, 2025 in Stockholm, Sweden.
Billie Eilish performs at Avicii Arena on April 23, 2025 in Stockholm, Sweden.
Samir Hussein // WireImage for Live NationThe Conversation reports that people with Tourette syndrome, like Billie Eilish, often suppress tics, an exhausting process crucial for treatment and understanding.

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