Related by context. Frequent words. (Click for all words.) 71 asthma bronchitis 63 animal dander 62 coughing wheezing 61 asthma allergies 60 asthma 60 Prolonged exposure 59 asthma emphysema 58 indoor allergens 58 pet dander 58 allergies asthma 57 lung diseases 57 respiratory illnesses 57 clog arteries 56 airborne allergens 55 respiratory ailments 55 throat irritation 54 wheezing coughing 53 chronic lung 53 respiratory 52 Hydrogen sulfide 52 respiratory irritation 52 Particulate matter 52 stuffy noses 52 lung ailments 52 respiratory symptoms 52 dehydration abdominal pain 52 respiratory tract 51 nitrous oxides 51 endotoxins 51 chronic respiratory 51 deplete oxygen 51 asthma triggers 51 airborne toxins 51 Passive smoking 51 skin rashes 51 skin irritations 50 heart arrhythmias 50 chronic sinus 50 asthmatics 50 ozone smog 50 Allergens 50 pulmonary disorders 50 seizures coma 50 asthma sufferers 50 particulates 50 skin ulcers 50 Cigarette smoke 50 meningitis pneumonia 50 fine particulates 50 respiratory diseases 50 fine particle pollution 50 air pollution 50 rotten egg odor 49 diesel exhaust 49 allergic reactions 49 toxins 49 Left untreated 49 bronchiolitis 49 induced asthma 49 Inhaling 49 mold spores 49 allergy triggers 49 metabolic acidosis 49 lung infections 49 asthma exacerbations 49 potent neurotoxin 49 incomplete combustion 48 abdominal cramps fever 48 acrolein 48 pulmonary diseases 48 pollutants emitted 48 Allergic reactions 48 sinus congestion 48 furans 48 blindness deafness 48 runny nose sore throat 48 rhythm abnormalities 48 breathing difficulties 48 bones joints 48 Sleep apnea 47 allergens 47 colds flu 47 respiratory illness 47 Inhaled 47 Shortness 47 lung disease 47 Periodontal disease 47 chronic bronchitis 47 Obstructive sleep apnea 47 chest tightness 47 asthmatic 47 noxious odors 47 vitamin B# deficiency 47 chronic cough 47 reflux disease 47 hydrogen chloride 47 PCBs polychlorinated biphenyls 47 nausea diarrhea 47 lung function 47 nausea dizziness 47 hyperthyroidism