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Paroxysmal nocturnal dyspnea or paroxysmal nocturnal dyspnoea (PND) is an attack of severe shortness of breath and coughing that generally occurs at night. [1] It usually awakens the person from sleep, and may be quite frightening. [ 2 ]
Acute severe asthma, also known as status asthmaticus, is an acute exacerbation of asthma that does not respond to standard treatments of bronchodilators (inhalers) and corticosteroids. [2] Asthma is caused by multiple genes , some having protective effect, with each gene having its own tendency to be influenced by the environment although a ...
[9] [10] Symptoms include episodes of wheezing, coughing, chest tightness, and shortness of breath. [3] These may occur a few times a day or a few times per week. [4] Depending on the person, asthma symptoms may become worse at night or with exercise. [4] Asthma is thought to be caused by a combination of genetic and environmental factors. [3]
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You’re not imagining things if it feels like your asthma is worse in the winter. You’re also not alone, as more than 25 million Americans suffer from asthma.
[9] [10] Antihistamines may help with sleep and decrease nighttime scratching. [2] Dermatitis was estimated to affect 245 million people globally in 2015, [6] or 3.34% of the world population. Atopic dermatitis is the most common type and generally starts in childhood. [1] [2] In the United States, it affects about 10–30% of people. [2]
Bronchospasm or a bronchial spasm is a sudden constriction of the muscles in the walls of the bronchioles.It is caused by the release (degranulation) of substances from mast cells or basophils under the influence of anaphylatoxins.
Orthopnea or orthopnoea [1] is shortness of breath (dyspnea) that occurs when lying flat, [2] causing the person to have to sleep propped up in bed or sitting in a chair. It is commonly seen as a late manifestation of heart failure, resulting from fluid redistribution into the central circulation, causing an increase in pulmonary capillary pressure and causing difficulty in breathing.