Recently I underwent a wisdom tooth extraction, and while there is still numbness I have observed something peculiar. If I drink cold water, it tastes sour, however the same effect is not observed with room temperature water or hotter. What is causing this effect?

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    $\begingroup$ Interesting question , this reminds me of miraculin which makes us perceive sour as sweet. Maybe something like that is happening in your case. $\endgroup$ – JM97 Sep 3 '17 at 14:14
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    $\begingroup$ My guess (hence not an answer) is that the regional block also affected your tongue and taste buds; signals might just have gotten crossed. $\endgroup$ – anongoodnurse Sep 3 '17 at 18:03
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    $\begingroup$ An interesting effect to note is that distilled water tastes very sweet. $\endgroup$ – Skyler Sep 7 '17 at 2:28

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