Hi everyone, Has anyone experienced this: can a child's lymph nodes behind the ears become enlarged…

Hi everyone, Has anyone experienced this: can a child's lymph nodes behind the ears become enlarged because of teething? Since December, my child's nodes have been enlarged on both sides — up to 16 mm. We had an ultrasound and blood tests, and everything came back normal. The child hasn't been ill. I don't understand why this is happening and I'm worried. I would really appreciate hearing other moms' experiences. Thank you.