Using 'treat to' often implies a generous or celebratory gesture.

Generosity Gesture

'Treat to' implies that you are paying for the other person's experience.

Personal Expense

The phrase is often used for special occasions or to express gratitude.

In medicine, 'treat to' involves giving professional care for a health condition.

'Treat to' suggests a methodical approach to address an ailment.

It can involve a series of actions or a plan to tackle an illness or injury.