It is common to be able to see or feel lymph nodes in a child’s neck. Nodes are supposed to enlarge in response to an infection and then get smaller after the infection is resolved (think about the “glands” that enlarge when you have a sore throat).
Most lymph nodes do not need to be removed. A node that is significantly enlarged or growing, or one that fails to resolve as expected may need to be removed or biopsied. Occasionally infected nodes can fill with pus and will need to be opened and drained before the infection will resolve.