Water Retention: Why It Happens and What Helps

A sudden puffy, swollen feeling — often in the face, hands or ankles — is usually water retention, not fat gain, and it has a handful of common, well-understood causes.

Salt is one of the biggest triggers

Excess sodium causes the body to hold onto more water to balance it out — a takeaway meal or a salty snack can genuinely cause noticeable puffiness the next day.

Hormones play a role too

Fluctuating hormones through the menstrual cycle, pregnancy or menopause commonly cause water retention, independent of anything eaten.

Sitting still for long periods contributes

Long flights, long car journeys or a day spent mostly sitting can cause fluid to pool, particularly in the legs and ankles.

What tends to help

• Drinking more water, not less — under-hydration can make the body hold onto water more, not less.
• Reducing excess salt where it's easy to do so.
• Moving regularly throughout the day rather than sitting for long unbroken stretches.
• Elevating legs if ankle swelling is the main issue.

The honest takeaway

Water retention is usually temporary and explainable — it's worth not mistaking it for fat gain and reacting with unnecessary restriction.