I tend to cough(usually dry) frequently when I am at my college-esp dusty places, but when at home I don't. However I have a consistent irritation in the throat and hence tend to clear my throat very often. When I consulted a doctor, he said there isn't any infection, but asked to have my blood tested for Eosinophil. The test result is as follows : Hb - 11.6gms% TC - 7200/cu.mm DC- Polymorphs 53% Lymphocyte - 43% Eosinophil - 4% ESR - 42 mm Please advice on the high ESR level