Respiratory medicine, also known as pneumology or pulmonology, is a branch of internal medicine. It deals with the airways, from the windpipe down to the finest branches of the bronchi, with lung tissue and with the pleura, the membrane that surrounds the lungs. Breathing disorders during sleep are also part of it. Respiratory diseases are a very common reason for seeking medical help.
Two chronic diseases are at the centre. In asthma, the airways are permanently inflamed and oversensitive: in response to triggers such as allergens, cold air, infections or exertion, they narrow. This leads to attacks of breathlessness, wheezing and coughing, often at night or in the early morning. COPD, chronic obstructive pulmonary disease, usually develops after many years of smoking. Coughing up phlegm and shortness of breath, at first only on exertion, slowly increase; an infection can suddenly make them worse.
Acute cases are mainly infections. Pneumonia usually shows itself through fever, coughing, breathlessness and pain when breathing, and in older people sometimes only through weakness or confusion. Acute bronchitis is mostly caused by viruses and usually clears up on its own. However, breathlessness can also come from the heart or from a blood clot in the lungs. That is why the heart is usually examined as well when the cause of breathlessness is unclear.
If a cough lasts longer than eight weeks, it counts as chronic and should be investigated. It needs medical attention sooner if blood in the phlegm, fever, unintended weight loss, night sweats or increasing breathlessness occur – and if a familiar cough changes in someone who smokes. Many causes can be treated specifically once they have been identified.