Some people I know would never eat anything cold during tonsillitis, because they think ice cream can worsen it (some others are afraid ice cream could cause it, when ice cream is eaten with a cold outside temperature, and some others - Get Rid of Summer Tonsillitis - are afraid ice cream could cause it when eaten during a very warm weather, but both of this is probably out of the scope of this question).
Some other claim eating cold food like ice cream can relieve symptoms and some other claim it can even help curing the tonsillitis.
Does ice cream help relieving tonsillitis symptoms or even help curing the tonsillitis (reducing the tonsillitis duration)?