Christina Applegate reveals her 13-year-old daughter has been diagnosed with POTS

Christina Applegate has revealed her 13-year-old daughter Sadie has been diagnosed with postural orthostatic tachycardia syndrome (POTS).

When I stand up, I get really, really dizzy, and my legs get really weak, and I feel like I’m going to pass out.”

Sadie said she was thankful for how her POTS had helped her relate to her mother’s MS.