Thank you for the useful information Marvin.
This is clearly an infection, can be viral or bacterial ---- as the white pockets you see on it are exudates secondary to inflammation.
Most of the times such infections are viral in origin and settle down spontaneously requiring no specific treatment; but for bacterial infection a round of antibiotics is required.
A throat swab is the most useful test to diagnose this with certainty.
Right now following measures will be helpful for you;
Gargles with luke warm water.
Motrin or aleve will reduce pain and inflammation (and hence the swelling) as well as fever.
Honey water is one of the best natural anti-inflammatory agent.
Plenty of hot liquids like coffee, green tea etc will provide a symptomatic relief.
If the symptoms persist, do not improve or get worse, see your doctor discussing all the details i have mentioned to get further management plan chalked out that suits best to your needs.
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