How to know if have swollen lymph nodes?

Feeling them.: You can usually feel them behind the ears and in front. along the sides of the neck also under the chin. Most are benign meaning (not cancer) shows your body might be fighting an infection.

Not always: Generally those that can be felt will be in the neck, in the armpit, along the inguinal area, and along the groove above the clavicle. These will feel like round bumps, usually a centimeter or more in size, and may or may not be tender, feel soft or hard, be movable or not. The clue is that they are new, and have not been felt previously.

Slight tenderness: You will feel slight tenderness in a small spot that will feel like a little bump under the skin!

You will be able to : If you can feel them with your fingers and they are bigger than one cm, they are considered enlarged.