Thanks for posting your query.
Tonsils are collection of lymphoid tissue in throat. Such type of collection is also present in other part of intestine like M cells and adenoids
These lymphoid organs are basically a protective organ for our body. These tonsils gets enlarged after engulfing bacteria & viruses.
So these organs are essential for our body.
In your wife's case, there appears to be some sort of infection in tonsils which gets precipitated after cold
drinks, oily food and ice cream.
She should avoid oily, ice cream, cold drinks and sour foods.
She should consult with ENT surgeon and physician.
She should take complete antibiotic course with few restriction.
If her condition don't improve with antibiotics then only surgical treatment
should be considered.
Dr. Mayank Bhargava