- 獨孤求敗Lv 71 十年前最愛解答
Why people cough?
The physiological action of coughing is responsible in part to the vagus nerve, which runs through the lungs to the brain. The vagus nerve is activated when capsaicin is released, which stimulates the sensory nerve endings. Centrally acting cough suppressants, such as codeine and dextromethorphan, reduce the urge to cough by inhibiting the capsaicin-induced sensory nerve by depolarization of the vagus nerve. One of the common presentations to the medical practitioner is dry cough. The common causes of chronic dry cough include post-nasal drip; Gastroesophageal reflux disease; Cough variant asthma; Drugs like beta blockers, ACE inhibitors, Aspirin, which should be investigated in people above 40 years; Post viral bronchial hyperresponsiveness; and Habitual Cough. When cough lasts for more than a few weeks multiple causes are likely and only when all the causes are treated will the patient be symptom free.
Beyond the physiological reasons for coughing there are also psychological reasons for coughing otherwise known as psychogenic or habit coughing. (Such as one who coughs or clears their throat before a public speech as a means to gain the attention of the audience or perhaps relieve their own nervousness) Steruphilia is a condition of loving the sound of coughing or sneezing. If one has ever sat next to someone who seems to enjoy coughing or sneezing loudly they might have hay-fever, or they might possibly be a steruphiliac.