Yolanda Hadid Describes "Pain" of Watching Bella Hadid's Struggle With Lyme Disease Bella Hadid has made it clear that her life is not picture-perfect. The model was diagnosed with Lyme disease—an infectious tick-borne illness that can cause lingering fatigue, pain, muscle stiffness and other debilitating symptoms, sometimes for years—in 2012 when she was 16. And she still endures flare-ups to this day.