Indoor air pollutants can always add to an assortment of health problems. Only due to indoor pollution, asthma and other respiratory diseases deteriorate further. If an asthmatic person sleeps in a couch where there are plenty of dust mites, that person may suffer from frequent asthmatic attacks during the night. Biological contaminants and dust particles can give people skin allergies, fungal infections, and several other ailments. It can result in recurrent allergy symptoms such as persistent coughing, sneezing, irritated eyes, and bronchitis. Indoor air pollutants are also the causative factors of nausea, vomiting and fatigue due to toxic gases and odors.