If there is no pain or any other symptom then it could be just simple tonsilloliths. (tonsillar stones.) and no need to take antibiotic without any symptom of infection.
Just do gargling with lukewarm water with salt , twice a day and take care of oral hygiene.
Read about it at some good medical site like webmd or some ENT doctors blog.
Next Steps
If it’s very frequent and with thorat pain/ fever visit some local ENT specialist.