Swallowing saliva with thumping brittle bone sound is a normal phenomenon, mainly considered to be due to the pharyngeal muscles and cartilage movement or due to the pharyngeal eustachian tube abnormal movement. When swallowing saliva due to the pharynx various cartilage and joints between the muscles, fascia together, resulting in friction between each other, and thus in the activities will produce similar to the sound of brittle bones, and through the nasopharyngeal pharyngeal tube to the tympanic membrane. Therefore, in most cases, the sound of thumping and crunching when swallowing saliva is a normal phenomenon, and there is no need to worry too much. In addition, structural and functional abnormalities of the laryngeal cartilage and abnormal opening of the Eustachian tube cannot be ruled out as causes of this symptom. If the sound is large, affecting the life, the patient is more worried, can go to the hospital in time to improve the relevant examination, clear diagnosis.