Dealing with water pressure, diving in the ocean?

So I was snorkeling off a mexican coast, and I wasn t diving very much. Just 10-15 feet maybe. And my tour guide had zero issue getting lower with no signs of discomfort. Any way of dealing with the water pressure on your ears? Or tough it out?
Update: I have no more discomfort, only when trying to get too low. I'm just trying to figure out a way to dive like the instructor to explore coral and what not
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