Hi,
Cough is a sudden, noisy and violent expulsion of air from the chest, caused by irritation in the air passages, or by the reflex action of a nervous or gastric disorder. Chronic and/or dry cough can be
side effects of chemotherapy and other cancer treatments.
Allergies and infection are common causes of cough.In response to the allergy-causing agent, people get drainage (usually clear drainage) or a "runny nose." Red, itchy eyes may accompany this cough too.