Children always say their ears are ringing when they sleep, if they have had upper respiratory tract infections in the early stage, or there is always nasal secretion after catching a cold, the most important reason may be otitis media. Therefore, it is best to go to the otolaryngology department of the hospital to do acoustic impedance, to clarify whether there is inflammation in the ear. If there is inflammation in the ear, it must be treated symptomatically, so as not to become chronic otitis media, which will recur after growing up and become irritated by inflammation. Of course, there are also some children who have cerumen impaction in the ear, which can irritate the tympanic membrane when they change their position during sleep, resulting in ringing in the ear.