I've had CRPS type II for over 5 years after venipuncture nerve injury to my right arm. Over the first two years it spread to the right half of my body, head to toe.

Although not frequent, I sometimes get uncomfortable sensations on the right half of my tongue, generally during big flare-ups. Neuropathy on the right half of my head in general is almost constant, especially upper lip, cheek, nose, ear, and scalp (like my hair is irritating on that side).

The tongue thing is pretty freaky when it happens, because it's only on the right side.