“…30 Particulate matter is a complex mixture of liquid and solid droplets suspended in gas which comprises sulphates, nitrates, carbon compounds, various types of dust, biological contaminants and gaseous contaminants. [37][38][39] Consequently, PM 10 , SO 2 and NO 2 have acute influence on eczema outpatients. 31,32 Oxidative stress via excessive ROS production by particulate matter exposure increases pro-inflammatory cytokines, such as TNF-a and IL-8, and MMPs.…”