Hi and welcome to HCM!
Thanks for posting your query here.
Tonsils are a pair of lymph
node collection in the throat. The action of lymph node is to protect the area from any pathological-bacterial or viral invasion. This is a common physiological process. In this process they will get swollen. If they get infected that results in difficult swallowing and pharyngitis
and finally fever
If you dont have the above mentioned symptoms it could be a physiological enlargement only.
If fever comes please take opinion of ENT doc. It can be relieved by antibiotics.
Hope this is helpful to you.