Neck lumps in children are common.
Usually these are lymph nodes that have appeared as a result of coughs and colds.
Lymph nodes or "glands" are lumps of tissue that are part of the immune system. They contain cells that help fight infections. It is therefore not surprising that when you have an infection, these lymph nodes swell up as a result.
However, a neck lump could also be much more serious, so it is important that you seek medical attention if you find that your child has developed a lump in the neck.