A member asked:

My son has cystic fibrosis and has a pee size bump right under his chin in his neck, should i be worried?

5 doctors weighed in across 2 answers

Lymph node: There are thousands of lymph node located around the body that help screen out germs in the body serum before it returns to the circulation. There are many in the neck, head, behind the ear. At rest these are often 1/4 inch in diameter and may grow to marble sized when reacting to a stimulus. Bug bites, or viral infections can increase their size.They should shrink down to nl size over a few wks.

Answered 12/10/2013

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Dr. Amrita Dosanjh answered

Specializes in Pediatric Allergy and Asthma

Multiple causes: The most likely cause is a swollen lymph node o an insect bite. If he wears a mask for his nebulized treatments, his mask should fit firmly but not too tightly.

Answered 3/29/2014

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