Small swelling in the neck of children comma commonest reasons and when to suspect serious problems?

Your Personal Child Specialist ! (rated World's top 5 Child health Podcast, Heard In 80 Countries!) show

Summary: Your personal child specialist doctor Gaurav Gupta discusses a tricky question, what are the reasons for neck swelling commonly in children and when do I need to worry as a parent and show to a pediatrician as soon as possible?