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Is the whole tongue affected or only one side of the tongue?
Is your tongue sensitive or painful?
Have you had excess saliva since you had the feeling of a big tongue?
Do you have pain or sensitivity on any side of the face, especially just near your ears?
How did you recover the last time - spontaneously?
This type of feeling occurs when there is numbness of the tongue.
Numb sensaton of any part of the body usually occurs when the nerve carrying sensation from that part is affected in any way - either pinched or compressed at some point or if there is a neuropathy (disease process).
Neuropathy occurs in conditions like diabetes, vitamin B deficiency etc.
The main part of the tongue is supplied by a nerve called the lingual nerve and the posterior part of the tongue by another nerve called the glossopharyngeal nerve.
The lingual nerve is a branch of the Trigeminal nerve. It enters the muscles of the mouth just in front of the ear and can very commonly get pinched in a condition called Temperomandibular joint syndrome (TMJ). It can also get affected after dental procedures like extraction of wisdom tooth at the time of injections for dental anesthesia.
Any problem in the Lingual nerve can cause numbness of the tongue with either alteration of decrease in the taste sensation. It can also cause the feeling that the tongue is too big for the mouth.
In your case, since you have sensitivity in front of the ear, you are very likely to have TMJ.
Please consult a neurologist for tests to determine where and how the nerve has been affected.
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The nerve carrying sensations from the tongue is the glossopharyngeal nerve.
You are welcome.
I hope you get well soon.