Bella Hadid and mom Yolanda. (yolanda.hadid/Instagram)Bella Hadid was recently hospitalized amid her struggle with Lyme disease, her mother, Yolanda, revealed in an Instagram post in which she called her "courageous."In an Instagram post shared on Thursday, Yolanda, a former Real Housewives of Beverly Hills star, reflected on how "watching my Bella struggle in silence" has fostered "the deepest core of hopelessness" within her."The invisible disability of chronic neurological Lyme disease is hard to explain or understand for anyone," Yolanda wrote.