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Thanks for contacting with your health concern
1. As the symptoms are there for a week now, consult an ENT Doctor [or get a second opinion] for a 
strep test and for further examination and management:
i. He will inspect the throat with a good torch and 
tongue depressor to look out for following possibilities:
- whether tonsils are red & inflamed with tender tonsillar lymph nodes below the angle of mandible [acute tonsillitis]
- whether entire throat i.e. posterior pharyngeal wall is inflamed [acute pharyngitis]
- are there inflamed rough granules over the posterior pharyngeal wall [granular pharyngitis]
ii. whatever be the cause, management of them remain the same:
. steam inhalation: 3-4 times a day. 
. warm salt water gargles. 
. voice rest and rest at home.
. take hot drinks to sip, avoid fried foods, cold drinks, ice cream, oily food
. Antibiotic, in either case, would be azithromycin/
erythromycin and syrup 
ibuprofen and 
paracetamol for symptomatic relief from pain and fever. 
PS. The choice of antibiotic will vary from doctor to doctor and from locality to locality