Swollen feet are a common symptom many people notice at the end of the day, during hot weather, or after long periods of standing. While mild swelling is often harmless, persistent or sudden swelling can sometimes indicate an underlying health issue.

The medical term for swelling caused by fluid buildup is edema. Understanding its causes can help you know when it’s normal — and when it needs medical attention.

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💧 What Is Edema?

Edema is the accumulation of excess fluid in body tissues, most commonly in:

• Feet 🦶
• Ankles
• Legs
• Hands

It happens when fluid leaks from blood vessels into surrounding tissues.

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🧠 1. Long Periods of Standing or Sitting

One of the most common causes is lifestyle-related.

When you:

• Sit for long hours
• Stand for extended periods

Gravity causes fluid to pool in the lower legs, leading to swelling.

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🌡️ 2. Hot Weather

In warm temperatures:

• Blood vessels expand
• Fluid shifts into surrounding tissues more easily

This can cause temporary swelling in feet and ankles.

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🧂 3. High Salt Intake

Eating too much salt can lead to fluid retention.

Why?

• Sodium causes the body to hold water
• Excess fluid may accumulate in tissues

This is one of the most common dietary contributors.

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🧠 4. Poor Circulation

Conditions that affect blood flow can lead to swelling, such as:

• Varicose veins
• Venous insufficiency
• Reduced leg muscle activity

When blood does not return efficiently to the heart, fluid buildup occurs.

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💊 5. Certain Medications

Some medications may cause edema as a side effect, including:

• Blood pressure drugs
• Anti-inflammatory medications
• Hormonal treatments

Never stop medication without medical advice.

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🤰 6. Pregnancy

During pregnancy:

• Body fluid volume increases
• Pressure on veins in the legs increases

Mild swelling is common, especially in later stages.

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❤️ 7. Heart, Kidney, or Liver Conditions

In some cases, swelling may be linked to internal organ function.

Possible causes include:

• Heart failure (fluid circulation issues)
• Kidney problems (fluid balance disruption)
• Liver disease (protein imbalance affecting fluid retention)

These conditions require medical evaluation.

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⚠️ When Swollen Feet May Be Serious