Hello,
Thanks for posting your query .
Please do not worry . Your symptoms are most probably due to an acute infection /inflammation and less likely due to cancer .Another possibility common in India is tuberculosis infection of the lymph nodes.
Lymph nodes in Cancer are gradual to develop over months and usually painless and hard and might be associated with signs like weight loss , loss of appetite , weakness etc .
As your doctor has rightly said it could be most probably due to Acute cervical lymphadenitis which means inflammation of neck lymph nodes due to any acute ( recent )cause like infection , inflammation ( injury ) etc.
However since you have a high ESR count I would recommend you get a fine needle aspiration biopsy of the lymph node done if it persists beyond a month from the onset.
This is a very simple test to rule out Tb of lymph nodes and infact it can sometimes rule out a suspician of cancer too.
Considering you are antibiotics it's advisable to wait till the course completion and a week more to watch for self resolution .
So please do not worry, it's most probably an infection likely to resolve with antibiotics , less likely tuberculosis ( since very recent) but a possible risk , and unlikely cancerous .
Hope I have answered your query.
Kindly accept my answer if you have no further queries.
Regards

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Hello,
Thanks for the follow up.
An ultrasound or CT scan can be used as a preliminary investigation for lymphadenitis but its not as confirmatory as FNAC or biopsy.
Please do not worry a FNAC is a very minor procedure just like a intramuscular injection or vaccination you might have taken . It's not necessary to undergo excision biopsy right now .
If you insist you can undergo a CT scan but I would still recommend FNAC over scanning .
Hope I have answered your query.
Kindly accept my answer if you have no further queries.
Regards.

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