He doctor i have a persistence throat pain,...

What is the treatment of persistence throat pain?
Cortisone by injection like decort. These drugs are used to relieve inflammation of mucosal surfaces,
NSAIDs such as ibuprofen 400mg 3 times daily
antihistamin drugs like cetrizine 10mg once daily
Drinking fluids, such as water or juice.
Apply warm compresses to your face.
Avoid cigarette smoke and polluted air.
Use ogmin 500mg tablets every 8 hours for 5 days in case of fever and tonsillitis by examination
Always use water and salt to  and gargle and take care of your teeth thoroughly every day
if the problem was inside the esophagus or the stomach then take esomeprazole 40mg once daily before breakfast
finally if you were in touch with a person who was diagnosed with covid 19 or travelled to an infected area especially if there are different symptoms like fever and cough you should get yourself tested
What are the symptoms of upper respiratory tract infection ?
fever
cough
nasal congestion
sore throat
What tests should you do?
examination of the mucous membranes by a doctor
complete blood count
 if cough present x-ray
endoscope in some cases
PCR in case of suspecting covid 19