Depends: That can vary but usually you will notice by week a difference if it is the right antibiotic and presuming the glands are reacting to a bacterial, not viral or other cause.
Answered 8/28/2018
3.5k views
Weeks: It can take weeks for a swollen lymph node to its prior size after an infection. The swelling is from a reaction in the node in response to infection.
Answered 8/28/2018
3.5k views
Better in few days: Swollen glands caused by infection start getting better after about 3 days on antibiotic as long as the right medication was chosen. Complete resolution may take weeks to months sometimes. Follow up with your doctor for a re-check if need be. Remember that some swollen glands are not from infections.
Answered 1/30/2021
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3 doctors weighed in across 2 answers
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