My son just showed me this painful lump on the side of his neck. It appeared overnight and he is really scared. The pediatrician is closed for the wee. Full article

Few things alarm a parent faster than discovering something unusual on their child’s body—especially when it seems to appear suddenly overnight.

One evening, everything may seem perfectly normal. Then the next morning, your child points to the side of their neck and says something hurts. You touch the area and feel a swollen lump that definitely wasn’t there before. Your child is frightened. You’re anxious. And to make matters worse, the pediatrician’s office is closed for the weekend.

Situations like this are surprisingly common, and while many neck lumps in children are caused by minor and temporary conditions, some do require prompt medical evaluation. Knowing what to look for can help parents stay calm, respond appropriately, and recognize when urgent care is needed.

This guide explains some common causes of sudden neck lumps in children, symptoms that may accompany them, warning signs to watch for, and practical steps parents can take while waiting to speak with a healthcare professional.