Can canker sore and stress cause swollen nodes under mandible. very stressed from college and compounded with a canker sore. health anxiety now too. ?

Yes: These lymph glands drain the area where the canker sores are located. The irritation can cause the lymph glands can get enlarged. There could be an infection that is also doing this and your physician can clarify. I doubt this is a serious problem but canker sores are very tender. you physician can clarify.

Don't worry: The lymph nodes are doing their biological function, so their presence is a good thing. Canker sores will get better in seven to ten days. Can try triamcinolone ointment buy over the corner apply twice daily. Anxiety from college is another matter. Would a visit to the counsellor help?