I got a good fucking idea. I ain't gotten to everyone yet, but I got here yesterday with Hank for Claire's birthday. I also got the results on her blood work.

Short version? She's suffering from a blood disorder that's paranormal in nature. Combination of anemia, bad electrolytes, normal insulin production and crazy glucose levels. Her body's swallowing itself trying to heal from a condition that's as aggressive as her healing ability, if not more.

Something's eating her alive, probably psychically, and if not for her power? She'd have been dead two days before this panel was run.