Thanks for contacting HCM I see you are concerned about having new lymph nodes appear under your left ear. Enlarged lymph nodes occur when your body is trying to protect itself from infection or insect bites. The enlargement can also be non-specific meaning they enlarge for unknown reason. Since your ear is also swollen there must be some type of irritation occurring to your ear. it could be a bug bite our it could be a small cyst which occur frequently behind the ear or it could be a small flair of your eczema. I recommend you continue to monitor the area and if the lymph node does not resolve in a week or so then seek medical attention Hope this answers your question. Please contact HCM again for your health care questions