She has high fever last week for 2 days and her right tonsil looks swollen. she has cough too with phlegm. yesterday she has fever again. what is this?

Pharyngitis: Infection of the throat. It could be caused by bacteria or virus If simple pain relief and rest do not help her to get better in few days, she might need to see the doctor for review.

Tonsillitis: Her symptoms could be due to Tonsillitis. This normally goes after a few days. Home remedies such as salt gargles can ease the symptoms until the infection goes. If she has ongoing fevers, it is a wise idea to see a doctor to rule out bacterial infection. She may need antibiotics as well. For more information on tonsillitis, see https://patient.info/health/tonsillitis-leaflet

Mgt.: I would suggest a throat swab for possible Strep infection, based on your description. Please see your PCP.