Good 1st step: Tongue swelling can be due to many reasons but when it doubt taking benadryl (diphenhydramine) is good first choice if no medical reasons to avoid antihistamines. If this has been ongoing for awhile there may be a blockage at the salivary glands or even the veins that drain that side of the tongue. This should be seen by MD very soon to help determine what the cause if. If problems breathing or rapid swelling - ER!
Answered 9/5/2015
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