Left ear sudden sharp pain, comes and goes in seconds, happen many times a day?

?neuralgia: A very rare condition, "nervus intermedius neuralgia" can act this way, and if you have slight altered taste over the left side of your tongue, this may be the answer. However, these symptoms could be due to infection, periodic blocking of the eustachian tube, and even referred problems from the jaw (tmj). An exam may pinpoint the issues.