Thank you for your query.
Your granddaughter is have acute tonsillitis
and the draining lymph
node has enlarged. It is advised that you consult your doctor and get a throat swab culture and sensitivity done and start with suitable antibiotic and decongestant. Be rest assured that the gland will not enlarge to such an extent that she will not be able to swallow or breathe.
I hope I have answered your query to your satisfaction.
Wishing your granddaughter an early recovery.