What does it mean if a child has lumps behind the ear and in the front and they hurt when the child opens their mouth and chews?

Everyone has lumps behind the ears and in the throat areas, as well as, in the head. These lumps are part of the lymph node system and some are just glands. When there is an infection in the body the lymph nodes will swell and be sore. Lymph nodes swell as they trap infection. If the lumps are glands, it could still be infection, but either way it is best to check with a doctor.

The information above is actually like true but maybe your child has a loose tooth.

Check your child's teeth and see is there a loose tooth if not then go check your doctor.