The short answer
Earplugs hurt on your side because most of them stick out past the ear, so the pillow pushes them into the canal all night. Foam makes it worse by pressing outward as it expands. The fix is a soft silicone plug that sits low in the ear, in the right tip size, so the pillow rests on your ear rather than the plug.
You put them in at eleven. By two you have taken one out, and by morning it is somewhere in the sheets.
If that is your experience of earplugs, the problem is probably not your ears. It is the shape of the plug and the fact that you sleep on your side.
What a pillow actually does to an earplug
Lie on your back and an earplug sits where you put it. Lie on your side and your pillow becomes a second force acting on it, pressing inward for hours.
Most earplugs stick out past the ear. Foam does, wax does, and so do a lot of silicone ones. That protruding part is a lever. Every time you press your head into the pillow you are driving the plug deeper into the canal, and the ear canal is not designed to be pushed into for eight hours.
That is the ache. Not an allergy, not a wrong size, not sensitive ears
Why foam is the worst of them for this
Foam works by expanding after you compress it. That expansion is the whole mechanism, and it is also the problem, because it presses outward against the canal wall continuously while a pillow presses it inward.
It also fails in the other direction. Foam that has expanded fully has nothing left to grip with, which is why it works for an hour and then migrates out of your ear.
What actually solves it
A plug that sits low in the ear rather than sticking out past it. If little protrudes, the pillow presses your ear instead of the plug, and the pressure goes where your body is already used to it.
That is the design brief behind every Vespré shape. Rest is a small rounded bud that sits inside the ear rather than on it, and Wing adds a soft fin that tucks into the fold of the ear to hold the plug while you turn over. There is more on how it works if you want the detail.
The fit still has to be right
A low shape solves the pillow problem. It does not solve a plug that is the wrong size for your ear, and that is the other half of why earplugs get abandoned.
Too large and you get pressure without a pillow being involved. Too small and it will not seal, so you hear everything and conclude the product does not work. There is a longer piece on working out which one you have.
Start with the medium tip. If you feel pressure, size down. If sound gets through, size up. Ears differ, and often your own two differ from each other, which is why more than one size comes in the box.
What to expect, honestly
These soften the room. They do not silence it. Most people still hear an alarm or someone saying their name, but ears and alarms differ, so set a test alarm on your first night. Anything that shut all of that out would not be safe to sleep in.
What they should do is take the edge off a partner's snoring, traffic, and a neighbour who is up before you are.
Thirty nights to decide, and used returns are fine. We would rather you slept in them properly than kept them in the packet in case you changed your mind.
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