These are the microabscess over the tonsils, this happens when there is repeated infection of the tonsil due to blockage of the crypts of the tonsils. Drink plenty of warm water, do gargles with betadine
gargles (1:1 dilution) 2-3 times after the food. If there i recurrent infection of the tonsil, you can as well get it removed.
Dr. Naveen Kumar