Tonsils still swollen after antibiotics: what to know

Antibiotics target selected bacterial infections; they do not remove swelling immediately and do not treat viral illnesses. Recovery can therefore lag behind the start or end of treatment. The original diagnosis may also need review, particularly if pain, fever, swallowing difficulty, or swollen glands are not improving, or if symptoms return after an initial improvement.

Do not take extra doses, change the schedule, or use another person’s medicine. A clinician may check adherence, examine the throat and neck, and decide whether testing or a different treatment is appropriate. Persistent one-sided swelling deserves particular attention.

Contact the prescriber or arrange a GP consultation with the antibiotic name, dose, start date, and any missed doses. Keep drinking, rest, and use labelled pain relief if suitable for you. Avoid smoking and alcohol-based mouth products that irritate the throat. Note whether swelling is improving, stable, or increasing, and whether one side is more affected.

Seek urgent help for difficulty breathing, drooling, inability to swallow fluids, a muffled voice, severe one-sided swelling, or difficulty opening the mouth. Get prompt medical advice if symptoms are worsening despite treatment, a new rash appears, or you feel faint or dehydrated. These features can require an examination rather than another antibiotic chosen without review.

Ask whether the swelling is following an expected recovery pattern, whether the original cause is still likely, whether a swab or other assessment is needed, and when it is safe to return to normal activities.