Water Retention: 7 Simple Tips for Summer Swelling

Warm weather, long journeys and hours spent sitting or standing can sometimes leave your legs, ankles or fingers feeling a little more swollen than usual.

This temporary accumulation of fluid is commonly described as water retention. Mild swelling can occur for everyday reasons, particularly during hot weather, but persistent or unexplained swelling can also have an underlying medical cause.

So why does water retention happen, and what can you do when you notice that familiar heavy or puffy feeling?

Key Takeaways

• Water retention describes an accumulation of fluid in the body's tissues.
• Hot weather, prolonged sitting or standing, hormonal changes and dietary factors can sometimes contribute to temporary swelling.
• Regular movement, adequate hydration and a balanced diet are sensible places to start.
• Magnesium and vitamin B6 perform important normal functions in the body, but supplements should not be presented as treatments for oedema.
• Sudden, severe, one sided or unexplained swelling should be assessed by a healthcare professional.

What is water retention?

Water retention occurs when excess fluid accumulates in the body's tissues. The medical term for swelling caused by fluid accumulation is oedema.

You may notice it around the ankles, feet, legs, hands or fingers. The affected area can sometimes feel tight, heavy or puffy.

Fluid normally moves between the blood vessels, tissues and lymphatic system. Several mechanisms help maintain this balance. When that balance changes, more fluid can remain in the tissues and swelling can occur.

Why can hot weather make you feel more swollen?

Some people notice that their ankles, feet or fingers feel puffier during warm weather.

Heat causes blood vessels near the skin to widen as part of the body's normal temperature regulation. Combined with long periods of sitting or standing, this can sometimes make temporary swelling more noticeable in the lower body.

A long summer flight, a full day sightseeing or several hours sitting at a desk in hot weather may therefore leave your ankles feeling different by the end of the day.

What can cause water retention?

Temporary swelling can have many possible causes, including:

• Hot weather
• Long periods of sitting or standing
• Long journeys
• High dietary sodium intake
• Hormonal changes during the menstrual cycle
• Pregnancy
• Certain medications

Swelling can also be associated with medical conditions affecting the circulation, heart, kidneys, liver or lymphatic system.

This is why persistent or unexplained swelling should not simply be assumed to be harmless water retention.

7 simple tips for occasional water retention

1. Stay hydrated

It may sound counterintuitive to drink water when you already feel as though you are retaining fluid, but restricting your fluid intake is generally not the solution to occasional swelling.

Drink regularly throughout the day according to your individual needs, activity level and environment. Your requirements may increase when you exercise or spend time in hot weather.

Plain water is an easy choice. Herbal tea can also contribute to your daily fluid intake if you enjoy it.

2. Be mindful of your salt intake

Sodium plays an important role in normal physiology and fluid balance, so salt is not something the body needs to eliminate completely.

However, consuming large amounts of sodium can influence fluid balance.

Instead of trying to remove all salt from your diet, pay attention to your overall intake. Highly processed foods, sauces, snacks and ready meals can sometimes contribute significant amounts of sodium without it being particularly obvious.

3. Include potassium rich foods in your diet

Potassium is an essential mineral that contributes to normal functioning of the nervous system, normal muscle function and the maintenance of normal blood pressure.

Many nutritious foods naturally provide potassium, including:

• Potatoes
• Beans and lentils
• Bananas
• Avocado
• Leafy green vegetables
• Tomatoes
• Some fruits

Rather than looking for foods that supposedly drain water from the body, aim for a varied diet that provides an appropriate balance of essential nutrients.

4. Move regularly throughout the day

If you spend long periods sitting or standing, build small moments of movement into your day.

Walk around the office, take the stairs, stretch your legs during a long journey or go for a short walk after work.

The contractions of the muscles in your legs help support the movement of blood back towards the heart, which is one reason why prolonged inactivity can make your legs feel heavy or swollen.

You do not necessarily need an intense workout. Frequent gentle movement can be a practical place to start.

5. Put your feet up after a long day

If your legs or ankles feel puffy after spending hours on your feet, resting with your legs elevated can feel comfortable.

Try lying down and supporting your legs with cushions so they are raised rather than hanging down.

This can be particularly pleasant after travelling, sightseeing or spending a hot summer day standing for long periods.

6. Make sure your diet provides essential vitamins and minerals

Rather than searching for a supplement that removes water from the body, focus on meeting your overall nutritional needs.

Magnesium, for example, contributes to electrolyte balance, normal muscle function and normal energy yielding metabolism.

Vitamin B6 contributes to normal protein and glycogen metabolism, normal functioning of the nervous system and the regulation of hormonal activity.

These are important normal physiological functions, but magnesium and vitamin B6 supplements should not be considered treatments for oedema or unexplained swelling.

If you are considering supplements, think about your overall diet and individual nutritional needs rather than using them specifically to remove retained fluid.

7. Make comfort part of your summer routine

After a hot or active day, simple habits can help you feel more comfortable.

Take a break from standing, wear comfortable clothing and footwear, stretch your legs and allow yourself time to rest.

A gentle massage may also feel relaxing for tired legs, although persistent swelling should be properly assessed rather than managed through massage alone.

What should you avoid when you feel swollen?

Feeling puffy can make quick fixes sound tempting, but trying to rapidly remove fluid from your body is not necessarily appropriate.

Avoid drastically restricting water intake or taking diuretics or products marketed for drainage without appropriate medical guidance.

The goal is not to remove as much water as possible. Water and electrolytes are essential for normal body function, particularly during warm weather and exercise.

When should you speak to a healthcare professional about swelling?

Occasional mild swelling after a hot day or prolonged period of sitting may resolve on its own. However, swelling can sometimes be a sign of an underlying health problem.

Seek medical advice if swelling is persistent, unexplained, worsening or accompanied by other symptoms.

Sudden swelling in one leg, particularly when accompanied by pain, warmth or redness, requires prompt medical assessment. Swelling accompanied by difficulty breathing or chest pain requires urgent medical attention.

If you are pregnant and experience sudden or significant swelling, contact an appropriate healthcare professional for advice.

Frequently Asked Questions

Why do my legs swell in hot weather?

Heat causes blood vessels near the skin to widen as part of normal temperature regulation. Some people therefore notice temporary swelling around their ankles, feet or legs during hot weather, particularly after spending long periods sitting or standing.

Does drinking more water reduce water retention?

Adequate hydration is important for normal body function, but drinking excessive amounts of water is not a treatment for oedema. Rather than restricting or forcing fluids, drink regularly according to your individual needs, activity and environment.

Does salt cause water retention?

Sodium is involved in normal fluid balance, and high sodium intake can influence how much fluid the body retains. You do not need to eliminate salt completely, but being mindful of foods that contain large amounts of sodium can be useful as part of a balanced diet.

Does potassium help with water retention?

Potassium is an essential mineral involved in several normal physiological functions, including normal muscle function and maintenance of normal blood pressure. Potassium rich foods can form part of a healthy balanced diet, but potassium should not be considered a treatment for unexplained oedema.

Does magnesium reduce water retention?

Magnesium contributes to electrolyte balance and normal muscle function. However, this does not mean that magnesium supplements can be claimed to treat or prevent water retention. Persistent swelling should be investigated according to its underlying cause.

Does vitamin B6 help with water retention?

Vitamin B6 contributes to several normal functions, including normal protein and glycogen metabolism and the regulation of hormonal activity. It should not, however, be presented as a general treatment for oedema or fluid retention.

Can exercise help when your legs feel swollen?

Regular movement can be particularly useful when swelling appears after long periods of sitting or standing. Walking and moving the leg muscles support normal circulation. Unexplained, painful or persistent swelling should still be medically assessed.

Why do I retain water before my period?

Hormonal changes during the menstrual cycle can influence fluid balance, and some people notice temporary bloating or swelling before their period. If symptoms are severe, unusual or interfere significantly with everyday life, discuss them with a healthcare professional.

Stay comfortable during the warmer months

Occasional puffiness does not need to take over your summer.

Stay hydrated, move regularly, eat a varied diet, pay attention to your salt intake and give your legs a break after long periods of sitting or standing.

Most importantly, listen to your body. Swelling has many possible causes, and supplements are not a substitute for understanding why it is happening.

When something feels unusual, persistent or painful, getting the right medical advice matters more than finding a quick fix.