Hello.  I have a non painful swollen lympnode under my chin. At least I think it is a lymphnode.  Seemed to have just popped there all of a sudden.  I have taken Benadryl just in case it was an allergic reaction. No response so I think it is safe to assume it is not an allergy.  If it is an infected lymphnode how long will it take to go away? Basically when should I worry that it is something else?  Thank you.
Hello and thanks for your question. If it is a lymph node it can take a few months to go away. Lymph nodes swell up in response to infection so if you have any infection in your mouth, like cavities in the teeth or gum infection you can get swollen up nodes. If you have such an infection then that needs to be treated. If it is not a lymph node it could be a cyst and if it becomes large and painful then you may need to have it Chat Doctor.  Lastly, lymph nodes can become infected, but this condition is pretty painful, and you would have a lot of pain and often fevers. I hope it resolves soon.