Claudette Dion, the sister of Canadian singer Celine Dion, has expressed concern over her sister's health, stating that they have not been able to find a suitable treatment for her diagnosed condition of "stiff person syndrome". Despite consulting with experts in the field, Celine's health has not shown significant improvement, and she has had to cancel her "Courage" world tour. Claudette believes that Celine needs rest and that it is important to listen to the signals that her body is sending her. Stiff person syndrome is a rare neurological disorder that causes stiffness and rigidity of the muscles and can lead to difficulties with movement and mobility.