Swollen lymph nodes on a toddler?

rherr❤️ • 🖤💙🖤 wife • DD1 • DD2 • SS1 • SS2 • 🐶🐶🐱🐶🐊

Yesterday while playing with my almost 5 year old daughter, I noticed some lumps around her neck. They’re about halfway down her neck between her neck in shoulders on both sides.

On one side, there’s two about the size of a pencil eraser and on the other side, there’s one about the size of a marble.. maybe a tad bit larger.

I’m 99% sure they’d lymph nodes.

So had no complaints about them at first but then later on in the day said that the larger one hurt.

She isn’t sick, hasn’t been sick, and I don’t think she’s getting sick. I know none of you are doctors... but does anyone have any idea why this could be happening??