Tired legs and varicose veins: when to seek medical advice

The sensation of tired legs is common. It can occur after a long day, during the hot summer months, after spending many hours standing or sitting, or as a result of unusual physical activity. It is often temporary and improves with rest or movement.

However, when the heaviness recurs, worsens towards the end of the day or is accompanied by swelling, pain, itching or visible varicose veins, it may be linked to a problem with the venous system.

These symptoms are not exclusive to varicose veins. They may also have a muscular, joint-related, neurological or lymphatic origin, amongst other possible causes. Therefore, rather than automatically attributing them to ‘poor circulation’, it is advisable to note when they occur, what other signs accompany them and how they develop.

An assessment allows the possible cause of the symptoms to be investigated, any contributing factors to be identified, and tailored advice to be provided before the symptoms begin to have a greater impact on daily life.

What does it mean to have tired legs?

The expression ‘tired legs’ does not describe a specific medical condition. It is a common way of referring to sensations such as heaviness, tension, diffuse pain, swelling or the need to move one’s legs.

Some people feel that their legs feel heavier towards the end of the day. Others notice swollen ankles, deeper marks left by their socks or a feeling of pressure that improves when walking, resting or elevating their legs.

When these symptoms recur week after week, forcing a change of footwear, making it difficult to stand, interfering with rest or causing the ankles to swell frequently, they are no longer merely a one-off inconvenience.

The clinical guidelines of the European Society for Vascular Surgery on chronic venous disease list heaviness, pain, itching, cramps and a feeling of swelling among the possible venous symptoms, which may intensify after standing for prolonged periods.

However, the guidelines themselves point out that these symptoms are non-specific. Their presence alone is not sufficient to diagnose venous disease, although it may warrant further assessment when they recur or occur alongside other signs.

“Many people dismiss heaviness or swelling as normal for years because they believe it is simply part of everyday tiredness. When these sensations recur, an assessment can determine whether there is a venous disorder, consider other possible causes and offer recommendations tailored to each individual case,” explains Dr Isaac Martínez, head of the Varicose Vein Unit at the Publio Cordón Memorial Hospital.

Why can varicose veins cause a feeling of heaviness?

The veins in the legs carry blood back to the heart. To do this, they rely on valves that help maintain the upward flow of blood and on the action of the calf muscles, which pump the blood every time we walk or move our ankles.

When the valves do not close effectively, some of the blood can flow in the opposite direction to normal, increasing venous pressure and causing certain veins to dilate. This phenomenon is known as venous reflux.

The scientific review *The Seriousness of Chronic Venous Disease: A Review of Real-World Evidence* explains that chronic venous disease can be associated with pain, discomfort, heaviness and swelling – symptoms that can affect quality of life.

Prolonged immobility can exacerbate these sensations because it reduces the activity of the calf’s ‘muscle pump’. For this reason, some people feel better when walking and experience greater heaviness after spending several hours standing or sitting. This pattern may suggest a possible venous cause, but it does not, on its own, allow a diagnosis to be made.

What symptoms might suggest a venous cause?

Certain characteristics raise suspicion of a venous cause, although none can confirm it on its own. It is common for venous discomfort to increase as the day progresses, to worsen in the heat or after remaining in the same position for a long time, and to improve when walking, raising the legs or resting.

The presence of visible varicose veins, swelling around the ankles, itching, skin changes or a family history of the condition may also reinforce the need for a medical assessment.

There is no need to wait until the pain becomes severe or advanced complications develop. A consultation may be helpful when symptoms are mild but recurrent, when a progressive worsening is observed, or when the person wishes to find out whether their occupation, medical history or daily habits may be affecting their venous health.

Even so, varicose veins may coexist with symptoms caused by another condition. Precisely for this reason, assessing the overall picture provides more information than interpreting a visible vein or a specific sensation in isolation.

Not all leg fatigue is caused by venous problems

Legs may feel tired following unusual physical exertion, due to a lack of rest, muscle weakness, joint problems or spinal disorders. Some neurological conditions can cause pain, tingling or restlessness, whilst lymphatic disorders can lead to more persistent swelling.

Oedema may also be linked to certain medicines or systemic diseases. Its distribution, the timing of its onset, its progression and the associated symptoms help the healthcare professional to identify its possible cause.

For this reason, the term ‘poor circulation’ is too broad to explain any discomfort in the legs. A clinical assessment allows us to determine whether the symptoms are consistent with a venous disorder, whether several factors are involved, or whether other possibilities need to be investigated.

Ruling out a venous cause also provides valuable information: it helps to avoid unnecessary tests or treatments and allows care to be directed towards the most likely cause of the discomfort.

When should you seek medical advice?

An occasional feeling of tiredness that sets in after a demanding day and goes away with rest does not usually mean the same thing as a recurring or progressively worsening problem.

As Dr Isaac Martínez explains, it is more useful to look at how symptoms develop over time rather than at a single isolated episode: ‘Rather than a one-off discomfort, we are interested in observing the pattern. When heaviness or swelling recur, worsen towards the end of the day, affect daily activities or occur alongside other changes in the legs, it may be worth having an assessment.”

It may be advisable to seek an assessment when:

• Heaviness, pain or swelling occur frequently or increase progressively;

• There are visible or increasingly prominent varicose veins;

• The symptoms interfere with work, rest or daily activities;

• There are changes in skin colour, persistent itching or hardening of the skin;

• A superficial vein is bleeding or a wound appears that is slow to heal;

• There is a personal or family history that raises concerns about venous health;

• You would like to find out the cause of your symptoms and receive personalised advice.

When is urgent medical attention required?

The sudden onset of significant swelling in a single leg, particularly if accompanied by pain, warmth or redness, requires immediate medical assessment. These symptoms may indicate a condition other than chronic venous disease, such as venous thrombosis.

When swelling occurs alongside shortness of breath, chest pain, dizziness or severe discomfort, urgent medical attention is required, as there may be a potentially serious complication.

Heavy bleeding from a superficial vein or a painful lesion accompanied by redness, discharge or other possible signs of infection should also be assessed promptly.

Understanding the cause to guide the next steps

The main outcome of an assessment is not necessarily the recommendation for a procedure, but rather obtaining a well-founded explanation. In some cases, a venous disorder is confirmed. In others, the nature of the symptoms points to a different cause. It may also be concluded that it is sufficient to take certain measures, carry out follow-up or monitor the condition’s progression.

Where there is a symptomatic venous condition, the information obtained enables a determination to be made as to whether any treatment options should be considered. The decision must take into account the symptoms, the venous anatomy, the patient’s expectations and the actual impact of the symptoms on their quality of life.

Heaviness and tiredness in the legs may be related to varicose veins, but do not constitute a diagnosis on their own. When the discomfort is recurrent, progressive or occurs alongside swelling, skin changes or visible veins, a specialist assessment helps to identify its possible cause and make decisions with greater certainty.

At the Varicose Vein Unit of the Publio Cordón Memorial Hospital, Dr Isaac Martínez and his team carry out a personalised assessment of patients with varicose veins, heavy legs, swelling and other leg complaints. The aim is to understand each individual’s situation, address any concerns and advise on the next steps without assuming in advance that treatment is necessary.

Medical information for general guidance

This article provides general information on the sensation of tired legs, its possible link to varicose veins and the situations in which it may be advisable to seek medical advice.

The information has been compiled from scientific literature and leading clinical guidelines, as part of the Publio Cordón Memorial Hospital’s commitment to providing accurate, understandable and up-to-date medical information.

Heaviness, swelling, pain or other discomfort in the legs can have various causes and require an individual assessment when they are persistent, progressive or accompanied by other symptoms. This content is not a substitute for a medical assessment nor does it allow for an individual diagnosis to be made.

The information in this article is provided for general awareness and does not replace an individualised medical assessment.