What causes under eye puffiness

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Last updated: April 4, 2026

Quick Answer: Under-eye puffiness is often caused by fluid retention, which can be triggered by factors like salty foods, lack of sleep, allergies, or the natural aging process that weakens tissues around the eyes. It can also be a symptom of underlying medical conditions.

Key Facts

What Causes Under-Eye Puffiness?

Under-eye puffiness, also known as periorbital edema, is a common concern that affects many people. It refers to the swelling or bags that appear beneath the eyes. While often a cosmetic issue, it can sometimes indicate underlying health problems.

Common Causes of Under-Eye Puffiness

Fluid Retention

One of the most frequent culprits behind under-eye puffiness is fluid retention, also known as edema. When your body holds onto excess fluid, it can accumulate in the delicate tissues around your eyes, making them appear swollen. Several factors can contribute to fluid retention:

Lack of Sleep and Fatigue

When you don't get enough sleep, your body doesn't have adequate time to repair and regenerate. This can lead to fluid accumulating under the eyes. Fatigue can also make the skin appear paler, making any swelling more noticeable. Furthermore, rubbing your eyes due to tiredness can irritate the delicate skin and worsen puffiness.

Allergies

Allergies are a significant cause of under-eye puffiness. Allergic reactions, whether to environmental factors like pollen, dust mites, pet dander, or certain foods, can trigger inflammation and release histamine. Histamine causes blood vessels to dilate and become leaky, leading to fluid buildup in the tissues around the eyes, resulting in swelling and often dark circles.

Aging

As we age, the tissues that support our eyelids, including muscles and collagen, weaken. The skin loses its elasticity, and the fat that normally helps support the eyes can shift downwards into the lower eyelids. This natural aging process can lead to the formation of under-eye bags or puffiness.

Genetics

For some individuals, under-eye puffiness may simply be a genetic trait. If your parents or close relatives have a tendency towards under-eye bags, you are more likely to develop them as well, regardless of lifestyle factors.

Lifestyle Factors

Underlying Medical Conditions

While less common, persistent or severe under-eye puffiness can sometimes be a symptom of an underlying medical condition. These can include:

If your under-eye puffiness is sudden, severe, painful, or accompanied by other concerning symptoms, it is advisable to consult a healthcare professional to rule out any underlying medical issues.

Sources

  1. Dark circles under eyes - Symptoms and causes - Mayo Clinicfair-use
  2. Swollen eyelid - NHSfair-use
  3. Edema - WikipediaCC-BY-SA-4.0

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