Thanks for your query.
There might be many reasons for lymph
node enlargement ranging from local inflammation, neoplastic growth to even dandruff
.The best thing you could do is to go get a clinical checkup from your doctor.After clinically examining he may advice you to go for a FNAC examination which will help in diagnosing the condition.
Yes it may be because of your allergy
. It may be because of upper respiratory tract
infection too .... there might be many other causes.
Hope this helps.
Update here how you stay.
take care .