My son suddenly noticed a painful lump on the side of his neck that appeared overnight, and he’s quite worried. The pediatrician is closed for the weekend—any advice?

A sudden lump in a child’s neck can be alarming for any parent or caregiver, especially when it appears without warning. It is natural for concern to rise quickly, but in many cases, these lumps are related to common and treatable conditions.

The majority of neck swellings in children are caused by lymph nodes reacting to infections such as colds, sore throats, or minor viral illnesses. Understanding this can help reduce immediate panic and allow for a more calm and observant approach while monitoring the child’s condition over time.