Yawning and rumbling in the ear is considered to be related to the movement of the Eustachian tube, excessive earwax and temporomandibular joint disorder. 1. Eustachian tube movement: when yawning, the Eustachian tube will be temporarily open, the air along the Eustachian tube in and out of the middle ear, then you will feel the sound, there may be rumbling, this is a physiological phenomenon, is normal. 2. Excessive earwax: When yawning, earwax touches the tympanic membrane, or the earwax is attached to the tympanic membrane, and the earwax will move along with the movement, resulting in a rumbling sound in the ear. 3. Temporomandibular joint dysfunction: If you have temporomandibular joint dysfunction, you will usually have joint popping, and there will be ringing in the ears when you yawn, eat with a big mouth and other activities. There may be other reasons for yawning and rumbling inside the ears, such as Eustachian tube dysfunction and otitis media. If it occurs frequently, it is recommended to seek medical attention to clarify the cause.