Hi and thanks for the query,
A mass in the neck, especially associated wit symptoms of not feeling very well in the child should be well evaluated. The commonest cause of the lump is generally an enlarged lymph node
. Other masses like cold
abscesses and lipomas
must also be considered. Causes could range from infections to tumours. A complete physical examination, full blood count, markers of inflammation measurement and at times Ct scans and MRI scans depending on the case might be necessary.
Consult his pediatrician
for a complete physical examination,
thanks and best regards,