The first step in determining a patient’s tooth pain etiology is .

The first step in determining this etiology is listening to the patient's perception of the problem, followed by a dentist's objective clinical testing to reproduce the patient's subjective pain symptoms.

Explanation:

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The application of an intermittent cryotherapy protocol after mild or moderate ankle sprain significantly reduced the level of subjective pain on activity, one week after the injury, compared with a standard protocol. There was no significant difference in terms of function, swelling, or pain at rest.