Sudden loss of hearing affects tens of thousands across the world each day. It can be caused by a blow to the head or a disease such as measles, but in the vast majority of cases the reason remains unknown.
A common theory is that the hearing loss itself is caused by a lack of blood flow – this can be temporary or permanent. It may also be due to a viral infection – some people report a “flu-like” illness in the preceding days.
Whatever the cause, it is a generally poorly-known fact that sudden hearing loss is a medical emergency and the earlier that treatment starts, the better.
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