Related by context. Frequent words. (Click for all words.) 60 animal dander 60 postnasal drip 60 aggravate asthma 59 wheezing shortness 59 respiratory irritant 58 asthma chronic bronchitis 58 bronchitis asthma 58 lung irritant 57 mold fungi 57 asthma bronchitis 57 pneumonia bronchitis 57 Nitrogen oxides 56 Prolonged exposure 56 Nausea vomiting 56 coughing wheezing 56 chronic bronchitis emphysema 55 coughing shortness 55 bronchitis pneumonia 55 Atopic dermatitis 55 obstructive lung 55 airborne allergens 55 Viral infections 54 breath wheezing 54 Allergic reactions 54 asthma eczema 54 post nasal drip 54 Dust mites 54 headaches dizziness nausea 54 Particle pollution 53 lung cancer mesothelioma 53 Prenatal exposure 53 asthma allergies 53 Ultraviolet light 53 eczema psoriasis 53 wheezing coughing 53 cramps heat exhaustion 53 Sunburns 53 trigger allergic reactions 53 diarrhea abdominal pain 52 ultraviolet UV rays 52 indoor allergens 52 lung ailments 52 diarrhea pneumonia 52 neurologic complications 52 Bacterial infections 52 Allergic rhinitis 52 convulsions coma 52 brittle nails 51 runny nose sneezing 51 Sulphur dioxide 51 Sulfur dioxide 51 outdoor exertion 51 pollen allergies 51 neck stiffness disorientation 51 cat dander 51 cerebral palsy blindness 51 bone marrow suppression 51 Abdominal pain 51 topical antibiotics 51 Volatile organic compounds 51 chronic sinus 51 headache muscle aches 50 dehydration abdominal pain 50 skin ulcers 50 pet dander 50 rhinitis 50 Nitrogen dioxide 50 runny nose sore throat 50 Obstructive sleep apnea 50 blindness deafness 50 Nominal GDP includes 50 asthma emphysema 50 hypobaric chambers 50 colds coughs 50 diarrhea dysentery 50 pulmonary disorders 50 cough runny nose 50 headache nausea vomiting 50 respiratory ailments 50 Acid reflux 50 Antihistamines 50 aspergillus 50 diarrhea constipation 50 angina chest 50 Herbal remedies 50 cerebral palsy mental retardation 50 sinus congestion 50 neurovascular diseases 50 diarrhea stomach cramps 50 Burning fossil fuels 50 allergy triggers 50 clammy skin 50 airway constriction 50 heel spurs 49 throat irritation 49 fatigue shortness 49 upper airway obstruction 49 Particulates 49 Migraine sufferers 49 fluorocarbons 49 eye irritations