Do not use this cream.
I have read that the Nerium cream's second listed ingredient is Nerium Oleander leaf.
Nerium Oleander is a very beautiful evergreen conservatory and Mediterranean shrub. All parts of the plant are highly toxic when ingested.
As you accidentally licked the cream this has caused a reaction on your tongue. You may like to have a chat with doctor about this, but hopefully your sensation of taste will return in time.
Wishing you a speedy recovery.
Best wishes.
Zinc can restore sense of taste in many situations. Hope it helps you. - it does sound like a sensitivity reaction to the cream. You may have to buy a different night cream... take the jar with you to the store and make sure it doesn't contain the same ingredients... especially the chemicals. I had a reaction to Hydroxatone. Made my face itch and peel...
I have not, but it sounds as if you had a reaction to this, consult your physican to be certain