10.1038/sj.npp.1301135 15 DbekJ.KuachA.GsiorZ
Although cigarettes have long been known for their potential hazards and addictive qualities, their usage has remained widely accepted over time
Open J Clin Diagn 3:58 Gorska KR, Domagala-Kulawik J, Korcznski P, Nejman-Gryz P, Kosciuch J, Hildebrand K, Chazan R (2008) Comparison of cellular and bichemical markers of airway inflammation in patients with mild -to-moderate asthma and chronic obstructive pulmonary disease: an induced sputum and bronchoalveolar lavage fluid study
Other causes include: Irritants such as shampoos, dirt, smoke, and pool chlorine A reaction to eye drops A reaction to wearing contact lens Fungi, amoebas, and parasites Conjunctivitis sometimes results from an STD