You've probably already tried everything for the bumps specifically
The bump is the hair — cut below the surface, growing back into itself
A multi-blade cartridge isn't failing to get close. It's succeeding, by design: the first blade lifts the hair up out of the follicle, and the blades behind it catch it while it's still stretched and sever it there — above where the hair naturally sits. When the hair retracts afterward, the cut end is now sitting below the surface of your skin.
As it keeps growing from there, it doesn't always find its way back out cleanly. Sometimes it curls and grows sideways into the surrounding skin instead of up and out — particularly with coarser or curlier hair, which is exactly the hair type most likely to curl back on itself once it's cut this way.
This isn't a theory about your skin. It's the stated engineering rationale for the extra blades themselves, from a mechanical engineer who's written on razor design: "With a single blade, multiple passes are required to compensate for this loss. To avoid multiple passes, other blades following the original blade effectively produce multiple passes with the same stroke." Translation: every blade after the first exists to catch the hair again, deeper, in the same stroke.
A multi-blade cartridge is designed to cut your hair below the skin line. Paximio isn't. One blade. Nothing follows it. There's no second, third, or fourth edge to catch the hair again after the first one lifts it — because there's only the first one, and it cuts once, where the hair already sits.
The razor that was buried, not invented
One blade, one angle — nothing to catch the hair a second time
The cut-depth problem is one variable. The other is angle: a pivoting cartridge head meets the hair at a slightly different angle on every stroke, which is part of why the same cartridge can feel inconsistent shave to shave. Paximio's blade is clamped at a fixed 30° that doesn't wander, doesn't pivot, doesn't hunt for the right position — which means the one cut it makes is a consistent one, not a moving target.
Put the two together and the mechanism is complete: one blade (nothing to catch the hair below the surface a second time) at one fixed angle (nothing inconsistent about where or how it's cut) — machined with enough weight that you never have to press to get there.
Why nobody's getting rich off you twice
In February 2004, a satirical newspaper ran a fake interview with a razor CEO joking that "five blades would make us the best razor that ever existed." Nineteen months later, a five-blade razor shipped for real. The U.S. Federal Trade Commission had its own words for the category: a "comfortable duopoly characterized by annual price increases that were not driven by changes in costs or demand." It's also, not coincidentally, one of the most shoplifted items in a supermarket — which is why cartridges live behind plexiglass next to the whisky.
None of that was ever about your shave. It was about the refill. Paximio runs on any standard double-edge blade — about €0.13 each, no proprietary cartridge, ever. You buy the razor once.