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The white round lesion near the palate looks like an aphthous ulcer.
Generally these are self limiting, but can sometimes stay for 1 or 2 weeks and subside.
There are no specific treatments for this, treatments are for symptoms of pain.
Benzydamine gargle can help reduce pain and irritation.
Xylocaine gel application can also reduce pain if causing too much of trouble.
Only in some cases soft tissue lasers can be used to remove the lesion and hasten healing.
I don't think it's related to the pericoronitis.
Patient replied :
Do I need to be checked for strep? The back of my throat looks inflamed and there is some white muscus like substance on the tonsils. See picture.
Thank you for the follow-up.
Yes, there is some inflammation and throat infection.
You're already taking amoxycillin and that is enough for the infection. Instead of 3 days, I advise you to take amoxy for 5 days to ensure there is no resistance. Otherwise, no further testing is required.