Does a pea size lymph node under a chin a sign of cancer? 5 months and its not painful. i have discomfort under my chin and tongue due toacid reflux.

No: Everybody has a few lymph nodes palpable in the neck. Since my strep throat as a second year med student, the one under my chin has been the size of a gorbanzo bean. Dozens of worried young adults have palpated it and been reassured. If your node is not growing, is not stony-hard, and isn't fixed to the surounding structures, ignore it.

Seek advice: Firm fixed nodes are of concern. May just be calcified have it seen for your peace of mind chuck.

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells/digested food. Lymph nodes "taste" the lymph everywhere for bad stuff like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.