Under-eye bags: causes, what helps and what cream really does

SKIN OVER 40

What are under-eye bags, and how are they different from dark circles?

Under-eye bags are a bulge below the lower eyelid, whereas dark circles are a discolouration. That is the most important difference, because the two are often lumped together even though their causes are completely different. Beneath the eye, behind a thin layer of skin and muscle, lies a fat pad that cushions the eyeball in the bony eye socket. A layer of connective tissue, the septum, holds it in place. If this fat pushes forward, or the loose tissue above it retains water, the typical swelling appears. The best way to tell whether your problem is a bulge is to look at yourself in profile or to look at the area from below with a hand mirror: a swelling catches the light and casts a shadow, while pure discolouration stays flat. Both can occur at the same time, because a shadow often forms beneath a bulge and looks like a dark ring. If it is mainly the colour that bothers you, you are better off reading what causes dark circles under your eyes and what helps with dark circles under the eyes.

Why are under-eye bags worse in the morning and almost gone by the afternoon?

Under-eye bags are worse in the morning because fluid collects in the face while you are lying down, and the tissue under the eye takes up water particularly easily. During the day, when you are upright, gravity helps it drain away, and blinking and the movement of your facial muscles do the rest. That is why your face often looks noticeably fuller at seven in the morning than at two in the afternoon. The skin on the lower eyelid is thin and the tissue beneath it is loose, so fluid shows up here sooner than on the cheek. Several things make it worse: a salty dinner, crying the evening before, hay fever or an allergy, sleeping on your front with your face in the pillow, and a short night. For many people, alcohol the evening before plays a part too.

How clearly lack of sleep shows was measured in a study in the journal Sleep. Researchers at the Karolinska Institutet photographed ten people once after normal sleep and once after 31 hours awake, which followed a night of only five hours’ sleep. Forty raters judged the faces after sleep deprivation as having, among other things, more swollen eyes, darker circles under the eyes and droopier eyelids. The same faces looked less puffy after normal sleep: this kind of swelling is temporary and not a fat pad.

Why do under-eye bags become permanent after 40?

Under-eye bags become permanent over the years because the fat pad under the eye gains volume and bulges forward, while the skin and surrounding tissue give it less support. In many people, this becomes noticeable from their 40s. Exactly how this happens was disputed for a long time. A study in the journal Plastic and Reconstructive Surgery measured the eye sockets of 40 people aged between 12 and 80 using high-resolution magnetic resonance imaging. The soft tissue below the eyeball increased with age, and fat accounted for the largest share of that increase. The position of the eyeball itself remained unchanged across all age groups. The authors conclude that the lower eyelids bulge with age mainly because the fat expands, rather than because the eyeball sinks or the septum slackens.

It becomes even more visible because the surrounding area changes as well. The cheek loses fullness, creating a groove between the under-eye bag and the cheek that accentuates the bulge. At the same time, the skin loses elasticity. What happens with sagging skin on the face and why the skin on your face thins with age is covered in separate articles. In practice, this means that a permanent under-eye bag is not a skincare mistake but anatomy. In some people, this predisposition is visible even at a young age. Drooping upper eyelids, by the way, are a separate topic and have little to do with under-eye bags.

What do cooling, sleep and less salt do for puffy eyes?

Cooling, sleep and less salt help with morning puffiness, but not with the fat pad of a permanent under-eye bag. All of these measures target the fluid: they make sure that less fluid builds up overnight or that it drains away more quickly in the morning. If your eyes are barely puffy by two in the afternoon, they are worth the effort. If the bulge looks the same in the evening as in the morning, you are better off saving yourself the trouble.

• Cooling: a cold, damp flannel, a chilled spoon or a cool pack from the fridge for a few minutes. Never put ice directly on your skin – always use a cloth in between. You do not need the current trend of dunking your face in ice water for this.
• Raise your head slightly: an extra pillow or a slightly raised head end of the bed can stop so much fluid collecting in your face overnight. Sleeping on your back helps more than sleeping on your front.
• Less salt in the evening: salty ready meals, crisps or soy sauce late in the evening encourage fluid retention the next morning in many people.
• Get enough sleep, and keep to regular hours: as described above, lack of sleep makes the eye area visibly puffier.
• Don’t rub: rubbing irritates the loose tissue even further. If hay fever has you constantly rubbing your eyes, have the allergy checked by a doctor.

Gently smoothing the skin with your fingertips, from the inner corner outwards, can help the fluid drain away. Gua sha and rollers work in essentially the same way: their effect comes mainly from cold and light pressure, not from the tool.

What can a cream do for under-eye bags, and what can’t it do?

A cream can moisturise the skin over under-eye bags and make it look smoother, but it does not change the fat pad underneath. No active ingredient applied to the skin reaches the fat behind the septum or makes it shrink. Even eye care with caffeine, which is often advertised for puffy eyes, can at best reduce morning puffiness briefly – it does not reach the fat pad. Honestly, that leaves skincare a modest but real role: dry, crêpey skin over a bulge makes it more noticeable. Well-cared-for skin shows fewer fine creases and reflects light more evenly.

That is exactly where a simple routine comes in. In The Duo, The Essential provides the skin with hyaluronic acid in three molecular sizes and niacinamide, and on top of it The Shield supports the skin barrier with ceramide NP and squalane – both fragrance-free. According to the instructions, the serum and cream are worked in from the centre of the face outwards and down over the neck. You do not need a separate eye cream for this. Because UV radiation speeds up skin ageing around the eyes just as much as on the rest of the face, daily sunscreen for your face is part of the routine. If you want to change the fat pad itself, you end up looking at eyelid surgery: only an operation removes or repositions the fat. Whether that is an option for you is a matter for a conversation with a doctor, not for a skincare guide.

When should you see a doctor about puffy eyes?

Puffy eyes need to be seen by a doctor if the swelling is new, sudden, one-sided, painful or accompanied by other symptoms. A review in Current Opinion in Ophthalmology groups the causes of swelling around the eyes into infections, inflammation or tumours, side effects of medication, and the consequences of surgery or injury. Most under-eye bags are harmless, but in individual cases an allergy, an inflamed eyelid, a thyroid condition or a kidney problem may be behind them. Get checked if any of these signs apply:

1. The swelling appears suddenly and on one side only.
2. The eyelid is red, warm or painful, or you have a temperature.
3. It itches badly, or the edge of the eyelid is red, flaky or crusted.
4. You are seeing double or less clearly, or your eyes are visibly bulging.
5. Your ankles or legs are swelling too, or you feel unusually tired and exhausted.

Your first port of call is your GP; for problems with your vision, bulging eyes or symptoms at the edge of the eyelid, go straight to an ophthalmologist. Skincare is no substitute for having this checked.

Frequently asked questions