<s>[INST] Hi, yesterday I was outdoors quite a bit and my allergies have gotten bad recently due to pollen count outside. This morning I woke up with the lymph nodes on the right side of my neck and under my chin slightly swollen and very sore. I am worried about what this could be. [/INST] Hi, thanks for using Chat Doctor Lymph nodes respond to any inflammation or infection in the body. An allergic response is a type of inflammatory reaction. It can cause enlargement of lymph nodesSince you have been experiencing bad allergies recently, then this is the possible cause. In addition to your normal allergy meds, you should use an anti-inflammatory painkiller such as ibuprofen, Catalan or naproxen provided you have no history of any reactions to these medications. I hope this helps </s>