I think some people have narrow or more sensitive ear canal. Give a try to kids' ear plugs and also see instructions how to insert them correctly (effortlessly

I think some people have narrow or more sensitive ear canal. Give a try to kids' ear plugs and also see instructions how to insert them correctly (effortlessly by pulling the ear up). I had a issue with foam ear plugs due to the pressure, but kids' foam ear plugs are perfect for me, even for side sleeping.