Nodule: A painful nodule can be a manifestation of an allergic reaction, infectious disease, hypersensitivity reaction to drugs, and other diseases. It is important to know where the nodule is, what medications you are on and whether you are having other symptoms such as cough, bowel problems arthritis. You should see your primary care doctor. He may refer you to a dermatologist for a biopsy.
Answered 2/16/2015
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