What does it mean if a person feels pain all over their body including the brain?

My 16-year-old sister has been suffering from a debilitating pain all over her body at the same time while she was doing nothing to make it happen. She has said her brain, lungs, stomach legs, etc were all in pain. I don't know why, but I think it maybe a tumor somewhere on the brain that is affecting the... show more My 16-year-old sister has been suffering from a debilitating pain all over her body at the same time while she was doing nothing to make it happen. She has said her brain, lungs, stomach legs, etc were all in pain. I don't know why, but I think it maybe a tumor somewhere on the brain that is affecting the nervous system.


She's fit, plays soccer, exercises everyday by walking , but firgets to rehydrate her body most of the time (she doesn't drink much fluids).
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