咳嗽是一种常见的症状，通常是由呼吸道的刺激引起的。当呼吸道受到病毒、细菌或其他因素的侵袭时，身体会通过咳嗽来清除气道中的异物和分泌物。然而，如果咳嗽伴随着咳出痰液的困难，这可能是多种原因造成的，包括感冒咳嗽、哮喘、肺炎等。了解这些可能的病因以及如何进行正确的鉴别诊断是有效治疗的关键。

首先，最常见的原因之一是上呼吸道感染，也就是我们常说的“感冒”。感冒咳嗽通常是由于鼻腔和咽喉部位的炎症所致，常常伴随有流涕、打喷嚏等症状。由于感冒咳嗽通常是自限性的，即可以自行好转，因此大多数情况下无需特殊治疗，只需注意保持水分充足、使用非处方药物缓解症状即可。

其次，支气管炎也是咳嗽气喘的一个可能原因。支气管炎是指气管和支气管黏膜的急性或慢性炎症，其症状包括咳嗽气喘、气喘气短、咳嗽气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气喘气