| Items [57] |
 |
|
Prev 1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 41-45 46-50 51-55 56-57 Next
|
Bronchitis
Bronchitis is an inflammation of the trachea and bronchial tree. Bronchitis may be either acute or chronic. Acute bronchitis may be caused by viral or bacterial infections and is often preceded by an upper respiratory tract infection. Acute bronchitis may also result from irritation of the mucous membranes by environmental fumes, acids, solvents, or tobacco smoke. Bronchitis usually begins with a dry, nonproductive cough. After a few hours or days, the cough may become more frequent and produce mucus. A secondary bacterial infection may occur, in which the sputum (bronchial secretions) may contain pus. People whose cough and/or fever continues for more than seven days should visit a medical practitioner.
Chronic bronchitis may result from prolonged exposure to bronchial irritants. Cigarette smoking, environmental toxins, and inhaled allergens can all cause chronic irritation of the bronchi. The cells lining the bronchi produce excess mucus in response to the chronic irritation; this excess mucus production can lead to a chronic, productive cough.
| | |
|
|
|
Hay Fever
Hay fever is an allergic condition triggered by the immune system’s response to inhalant substances (frequently pollens). Researchers have yet to clearly understand why some people’s immune systems over-react to exposure to pollens while other people do not suffer from this problem. Symptoms of hay fever are partly a result of inflammation that, in turn, is activated by the immune system.
What are the symptoms of hay fever?
Inhaled allergens trigger sneezing and inflammation of the nose and mucous membranes (conjunctiva) of the eyes. The nose, roof of the mouth, eyes, and throat begin to itch gradually or abruptly after the onset of the pollen season. Tearing, sneezing, and clear, watery nasal discharge soon follow the itching. Headaches and irritability may also occur.
| | |
|
|
|
Sinusitis
Sinusitis is an inflammation of the sinus passages. There are four pairs of sinuses in the human skull that help circulate moist air throughout the nasal passages. The common cold is the most prevalent predisposing factor to sinusitis. Hay fever, other environmental triggers, food allergens, and dental infections can also lead to sinusitis.
What are the symptoms of sinusitis?
Acute sinusitis typically causes symptoms of nasal congestion and a thick yellow or green discharge. Other symptoms include tenderness and pain over the sinuses, frontal headaches, and sometimes chills, fever, and pressure in the area of the sinuses. Chronic sinusitis differs slightly, in that symptoms can be milder and may only include postnasal drip, bad breath, and an irritating dry cough.
| | |
|
|
|
Allergies and Sensitivities
Allergies are responses mounted by the immune system to a particular food, inhalant (airborne substance), or chemical. In popular terminology, the terms “allergies” and “sensitivities” are often used to mean the same thing, although many sensitivities are not true allergies. The term “sensitivity” is general and may include true allergies, reactions that do not affect the immune system (and therefore are not technically allergies), and reactions for which the cause has yet to be determined.
Some non-allergic types of sensitivity are called intolerances and may be caused by toxins, enzyme inadequacies, drug-like chemical reactions, psychological associations, and other mechanisms. Environmental sensitivity or intolerance are terms sometimes used for reactions to chemicals found either indoors or outdoors in food, water, medications, cosmetics, perfumes, textiles, building materials, and plastics. Detecting allergies and other sensitivities and then eliminating or reducing exposure to the sources is often a time-consuming and challenging task that is difficult to undertake without the assistance of an expert.
What are the symptoms of allergies?
Common symptoms may include itchy, watery eyes; sneezing; headache; fatigue; postnasal drip; runny, stuffy, or itchy nose; sore throat; dark circles under the eyes; an itchy feeling in the mouth or throat; abdominal pain; diarrhea; and the appearance of an itchy, red skin rash. Life-threatening allergic reactions—most commonly to peanuts, nuts, shellfish, and some drugs—are uncommon. When they do occur, initial symptoms may include trouble breathing and difficulty swallowing.
| | |
|
|
|
Hay Fever
Hay fever is an allergic condition triggered by the immune system’s response to inhalant substances (frequently pollens). Researchers have yet to clearly understand why some people’s immune systems over-react to exposure to pollens while other people do not suffer from this problem. Symptoms of hay fever are partly a result of inflammation that, in turn, is activated by the immune system.
What are the symptoms of hay fever?
Inhaled allergens trigger sneezing and inflammation of the nose and mucous membranes (conjunctiva) of the eyes. The nose, roof of the mouth, eyes, and throat begin to itch gradually or abruptly after the onset of the pollen season. Tearing, sneezing, and clear, watery nasal discharge soon follow the itching. Headaches and irritability may also occur.
| | |
|
|
Prev 1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 41-45 46-50 51-55 56-57 Next
|
|
