While eating dinner,  allof a sudden, the end of mytongue began stinging and swelling.  I looked and saw that  part of it was purple. I put ice on it, and the pain started going away, but there is still an area of about one centimeter that is purple. What is it?
Thanks for your query, I have gone through your query. The stinging and swelling of the tongue could be because of the trauma to the tongue like biting while having food or due to allergy to some food item. The purple color over the tongue could be because of the hematoma secondary to the trauma. Consult an oral physician to rule out these things. You can apply alternative hot cold and hot fomentation. If it is because of allergy then you have to take antihistamines. I hope my answer will help you, take care.