White patches on tongue and cheek would be euther leukoplakia
or candidal oral thrush
Internal diseases like DM,HIV,anaemia
and other diseases should be ruled out.
His dieases is mot related with shots.
If he is having bad habit of tobacco or smoking, he should leave it.Oral hygiene
should be improved with antiseptoc gargles.
Antifungal tablets with antifungal oral paits would be advised for about 2 weeks.
If no response, antoxidants orally for few months and local tacrolimus oint 0.03% should be applied on the white patches in mouth.
Improve immunity withimmunobusters.
Have healthy food.
I hope you got my answer.
Dr. Ilyas Patel MD