I also thought my lymph nodes were swelling and very tender. I also found out it was my salvia glands. At times they swell so much, they seem to cause swallowing issues. My many specialist told me to try sour candy to help make the glands to work overtime. Because of my gastrointestinal problems from covid, I used peppermint. My gland swelling has reduced, to the point that it is not an issue for me.