See below: Rheumatoid arthritis is a systemic autoimmune disease that typically causes significant joint pain, swelling and stiffness in the hands and feet due to an overactive and uncontrolled immune system.
Answered 3/30/2016
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Auto immune disease: For some reason the body attacks part of itself using the immune system . It mistakes you own tissue for something not supposed to be there an attacks the tissue.
Answered 7/11/2013
5.6k views
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