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It is very possible.
When we are exposed to life threatening worries or trauma our minds sometimes transfer the emotional issues into our physical world. It makes sense, for if you are nervous about a test or speech or similar your body tells you that you are worried by showing physical issues like: stomach problems, rashes, sweating etc. Our sympathetic nervous systems arouse this in us, and once done, it can cause the types of symptoms you describe.
The name of the type of disorder this is, is called: A Somatoform Disorder. This reaction is specifically called a conversion disorder, and was it identified even more than 100 years ago. It is treatable through therapy and emotional support.
I would certainly encourage mom to seek some emotional support. With it, I am very sure this behavior can be rectified. Steven