I correctly diagnosed myself with CRS.
If "things" change you are on the track of Celiac or other gluten sensitivity problem. Once you pin that down you can get a gene test to see if you have the gene for Celiac ~ of course you could have any one of 11 other genes for Celiac for which there is no test (yet).
Celiac can also be associated with Autism (due to the victim having a thin intestinal wall ~ in whole or in part ~ which allows "leakage" into the blood stream.
Glad she caught that particular sympton though. Lot of these guys have been trained to not worry about it unless there's a lesion or glioma somewhere ~ and sometimes there's not.
Advanced stages of CRS are also known as CRAFT.
If by "CRS" you mean some syndrome recognized by medical science, what is it? Or are you trying to make a joke?