This is a common issue, most of the time going unnoticed by medical doctors and inflicted persons as well.Source is manifold, and I would like to try summarizing it in this short text.Textbooks in Medicine treat major illnesses but omit most frequently encountered ailments.Hence, I will concentrate my effort on those last ones.Laboratories perform all sorts of exams in this direction, and some are sophisticated. But, if you just feel unwell, and do not even want to consult your physician, what can you do to ascertain about an existing inflammation?