Under-eye puffiness is one of the few skincare concerns with a fast, reliable fix. It is also one of the most heavily oversold, because the things that genuinely work are unglamorous and mostly free.
What follows is the honest version. What causes it, what resolves it, and where a product earns its place rather than simply being present while something else does the work.
It is fluid, and that changes everything
Morning puffiness is almost always fluid accumulation in the tissue around the eye. Not fat, not swelling in any inflammatory sense, and not permanent.
Lymphatic drainage relies partly on movement and gravity. Lying flat for seven or eight hours removes both, so fluid that would normally clear during the day settles in the loose tissue around the eyes, which happens to be some of the most accommodating tissue on the body for exactly that.
This explains most of what people observe. It is worse on waking and improves through the morning as you move around upright. It responds to salt, alcohol, and crying, all of which affect fluid balance. It varies day to day rather than being fixed. And it resolves on its own, which is why the interventions that work are ones that accelerate a process already underway.
What genuinely reduces it
Cold
The most effective single intervention, and it works through vasoconstriction. Cold narrows blood vessels and reduces the leakage of fluid into surrounding tissue, while also making existing fluid drain slightly faster.
Anything cold works. A chilled spoon, cold water, a refrigerated mask. What matters is temperature and contact time, roughly ten to fifteen minutes, not what the cold object happens to be. Any product that produces a de-puffing effect within minutes is producing most of it through temperature, and being clear about that is useful when assessing whether something is worth its price.
Elevation
Sleeping with the head slightly raised, an extra pillow or a wedge, prevents a meaningful proportion of the overnight accumulation rather than treating it afterwards. Prevention is more effective than resolution here, and it requires no ongoing effort once set up.
Gentle drainage
Light pressure moving outward from the inner corner toward the temple, following the direction lymph actually drains. Very light, the skin here is roughly a quarter as thick as elsewhere on the face and does not tolerate pressure well.
This works, but it is worth being precise about why. The improvement comes from the direction and gentleness of the movement, not from whatever is on your fingers or from any tool being used. A roller helps by making the motion easier to do consistently, not by adding anything of its own.
Time
Under-recognised. Most morning puffiness resolves substantially within two hours of being upright and moving. If you have somewhere to be at eleven, the puffiness at seven will largely have handled itself.

What is worth changing rather than treating
Sodium intake the evening before, because salt increases fluid retention and the effect shows around the eyes first.
Alcohol, which dehydrates and dilates blood vessels simultaneously, worsening both puffiness and vascular shadowing.
Sleep position, since sleeping face-down allows fluid to pool directly in the area.
Allergies, which are a frequent and frequently missed cause. Persistent puffiness accompanied by itching, particularly seasonal, is likely allergic rather than fluid-mechanical, and addressing the allergy resolves it in a way that no eye treatment will.
Untreated puffiness over years, incidentally, contributes to the skin stretching slightly, which is one route to the loose under-eye skin that ages the area faster.
Where products actually help
Two things, honestly assessed.
As a delivery format for cold. A refrigerated mask holds a low temperature against the area consistently for the full treatment window, which is more effective than a spoon that warms within a minute or cold water that evaporates. That is a genuine advantage, though it is an advantage of format rather than formula.
Hydration, which helps indirectly. Well-hydrated skin looks smoother and reflects light more evenly, which reduces the shadow cast by any residual swelling. It does not remove fluid, but it changes how visible the fluid is. Over time, better-hydrated skin around the eye is also more resilient to the stretching that repeated puffiness causes.
Eye Catcher suits this specifically. Bio-cellulose adheres closely enough to hold cold against the contour rather than sitting loosely over it, and it carries Sodium Hyaluronate, Panthenol and Allantoin, hydrating and soothing rather than aggressive, which is the right priority for thin skin. Refrigerate the sachet for ten minutes before use and it does both jobs at once.
The Gold Mask Eye is the more concentrated option, gold foil over cellulose with 83% Rose of Jericho. Worth noting that the foil traps warmth rather than cold, so it works differently, better suited to treatment than to morning de-puffing.

What does not work
Caffeine has a genuine but modest vasoconstricting effect, roughly comparable to cold and considerably shorter-lived. It is not doing more than the temperature it is usually delivered at.
Anything promising permanent reduction is either describing prevention, which works but is behavioural, or describing something topical products cannot achieve.
Aggressive massage or heavy pressure makes things worse rather than better, since the skin is thin and mechanical stress causes both inflammation and the gradual loosening that leads to persistent puffiness.
And products for the wrong problem entirely. If what you have is hollowing rather than swelling, de-puffing treatments have nothing to act on. The distinction is straightforward to check, puffiness raises the area and improves through the morning, hollowing creates a depression and looks identical at any hour.
What to do on a morning when it matters
Refrigerate a mask while you shower. Apply for ten to fifteen minutes with the head slightly elevated. Drainage with light outward pressure afterwards. Then leave it alone, because most of the remaining improvement comes from being upright and moving.
If the event is later in the day, the honest advice is that you probably do not need to do anything. Two hours of normal activity resolves most of it.
The night before matters more than the morning after. Low salt at dinner, minimal alcohol, an extra pillow. Prevention takes less effort than correction and works considerably better.