If the heart does not pump blood efficiently, fluid may build up in the legs, feet, and ankles.
8. Kidney Issues
The kidneys regulate fluid levels in the body. If they are not working properly, extra fluid can collect in the legs.
9. Liver Disease
Liver problems may lower the level of important proteins in the blood, causing fluid leakage into tissues.
10. Certain Medications 
Some medicines can cause swelling as a side effect, including:
Blood pressure medications
Hormone therapies
Anti-inflammatory drugs
When to See a Doctor 
Seek medical advice if swelling:
Appears suddenly
Is painful or severe
Occurs in only one leg
Comes with shortness of breath or chest pain
Simple Tips to Reduce Swelling
Elevate your feet when resting
Reduce salt intake
Drink enough water
Exercise regularly
Avoid sitting or standing for long periods
Small lifestyle changes can often help manage swelling, but persistent swelling should always be checked by a healthcare professional.
