Thank you for your query,
As the swelling is on neck it is not due to Mumps
But this swelling could be due to an enlarged cervical lymhnode which may be due to some infection in its draining area.
In mumps there will be swelling of parotid glands which lie in front and just below the ears and swellings of sub-mandibular salivary glands which present below the jaw.
So consult your Pediatrician
for the assessment of the swellings and for evaluation.
is very important aspect of preventing infections in children and timely vaccination
Hope i have answered your query.