Hi.
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain swollen tonsils as well as swelling of lymph nodes under the jaw can be due to a number of reasons like
Throat infection caused by bacteria or virus,
post nasal drip, sinusitis, acid reflux etc..
The most common cause seems to be infection..
I would suggest that she should take a course of antibiotics like
Azithromycin or
levofloxacin, take anti-inflammatory painkiller like Ibuprofen, do warm saline gargles and steam inhalations..
Chew a Vitamin C pellet daily..
Avoid spicy food and drink plenty of water..
Maintain a good
oral hygiene..
In case of no improvement consult an ENT expert and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.