【导读】人的鼻咽部至中耳腔有一狭窄的长约2.5厘米～3.5厘米的咽鼓管，两端均有开口，是沟通鼻咽与中耳腔的管道。咽鼓管在平时闭合成缝隙状，在张口、吞咽、呵欠、歌唱时咽鼓管开放以调节鼓室气压，保持鼓膜内、外压力的平衡，维持中耳传音装置的各种正常活动，有利于声波传导。
　　各类鼻炎、咽炎、扁桃体炎的思者由于鼻咽部炎性渗出，分泌物增加，粘膜肿胀，使咽鼓管发生堵塞下不能正常开放。外界空气不能进入中耳腔，中耳腔内的气体逐渐被粘膜吸收，中耳腔内形成负压（鼓膜内陷）且发生病理变化。粘膜充血、肿胀、毛细血管通透性增加，鼓室内出现漏出液形成中耳腔积液，影响传音功能的正常传导，从而使听力减退。
　　慢性咽炎的病因
　　1.慢性咽炎的局部因素
　　(1)急性咽炎反复发作所致。
　　(2)各种鼻病及呼吸道慢性炎症，长期张口呼吸及炎性分泌物反复刺激咽部，或受慢性扁桃体炎、牙周炎的影响。
　　(3)烟酒过度、粉尘、有害气体的刺激及辛辣食物等都可引起本病。
　　2.全身因素如贫血、消化不良、下呼吸道慢性炎症、心血管疾病、内分泌功能紊乱、维生素缺乏及免疫功能低下等。
　　慢性咽炎的病理
　　1.慢性单纯性咽炎咽黏膜充血，黏膜下结缔组织及淋巴组织增生，鳞状上皮层增厚，上皮下层小血管增多，周围有淋巴细胞浸润，黏液腺肥大，分泌亢进。
　　2.慢性肥厚性咽炎黏膜充血增厚，黏膜下有广泛的结缔组织及淋巴组织增生，黏液腺周围淋巴组织增生，形成咽后壁多数颗粒状隆起。常见咽侧索淋巴组织增生肥厚，呈条索状。
　　3.萎缩性咽炎与干燥性咽炎临床少见，病因不明。病人常伴有萎缩性鼻炎。主要病理变化为腺体分泌减少，黏膜萎缩变薄。
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推广业务合作联系电话： QQ：咽喉炎症状起因
咽喉炎症状是怎么引起的？引起咽喉炎症状的疾病有哪些？
　　一、急性：　　常为病毒引起，其次为细菌所致。冬春季最为多见。多继发于急性、急性、，且常是，流感，等传染病的并发症。受凉、、长期受化学气体或粉尘的刺激、吸烟过度等，降低人体抗力，容易促其发病。　　二、慢性：　　主要是由于急性咽炎治疗不彻底而反复发作，转为慢性，或是因为患各种病，鼻窍阻塞，长期，以及物理、化学因素、颈部放射治疗等经常刺激咽部所致。全身各种慢性疾病，如、、下呼吸道慢性炎症、心血管疾病等也可继发本病。
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咽喉炎相关文章　　慢性咽炎怎么引起的口臭是指口内出气臭秽的一种症状，贪食辛辣食物或暴饮暴食，疲劳过度，感邪热，虚火郁结，或某些口腔疾病，如口腔溃疡、龋齿以及消化系统疾病都可以引起口气不清爽。引起口臭的原因有几种。
　　慢性咽炎怎么引起的　　一、口腔疾病：患有龋齿、牙龈炎、牙周炎、口腔粘膜炎以及蛀牙、牙周病等口腔疾病的人，其口腔内容易滋生细菌，尤其是厌氧菌，其分解产生出了硫化物，发出腐败的味道，而产生口臭。
　　二、长期的便秘，会因体内产生的有害物质不能及时排出，被吸收入血而引起口臭以及腹胀、食欲减退、易怒等自体中毒症状.
　　常见的引起口臭的病因都有什么?
　　三、吸烟、饮酒、喝咖啡以及及经常吃葱、蒜、韭菜等辛辣刺激食品，或嗜好臭豆腐、臭鸡蛋等具有臭味食物的人，也易发生口臭。
　　四、晚餐太“重”，吃得过饱或进食肉类、油腻食物比重过大或辛热刺激性调料用量过大，浓香有余、清淡不足，晚餐距睡眠时间过短，睡觉时胃中还存留着过多食物等等。
　　五、节食减肥，或因病不能进食，或老年人的唾液腺功能降低、妇女在月经期间出现内分泌紊乱而导致唾液分泌减少，有利于厌氧菌生长，因此发生口臭。
　　六、心理压力过大，经常性的精神紧张导致身体副交感神经处于兴奋状态，反射性地出现消化腺，尤其是唾液腺分泌减少，导致口干，从而有利于厌氧菌生长，而产生口臭。
　　七、胃肠道疾病，如消化性溃疡、慢性胃炎、功能性消化不良等，都可能伴有口臭。近来，我们还发现，导致许多胃疾病的幽门螺杆菌感染者，其口臭发生率明显高于未感染者，而根治幽门螺杆菌后，口臭症状明显减轻。原因可能是幽门螺杆菌感染直接产生硫化物，引起口臭。
　　慢性咽炎怎么引起的 综上所述，相信您对哪些原因诱发的口臭也有了一定的了解，希望对您能有一定的帮助，了解了口臭的原因，大家可以针对预防，这样能够有效的减少口臭的发病率。
　　北京口腔科排名白塞氏病是一种全身性、慢性、血管炎症性疾病...