Have a lymph node but why it did not hurt?

Lymph node: We all have lymph nodes. They can swell in response to inflammation or infection. Swollen nodes may or may not be uncomfortable with pressure. If you have chronically enlarged nodes that would warrant evaluation.

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad 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.