As a plastic, cosmetic, and reconstructive surgeon, I often encounter patients who ask me, ‘Why do my legs hurt?’ Leg pain is an extremely common symptom that can manifest in many ways, from mild discomfort after a long walk to severe leg pain that interferes with daily life. My goal with this article is to provide you with a comprehensive guide so that you can identify the possible reasons behind your leg pain and know when it is crucial to seek professional help. The key is not to underestimate the signals our body sends us.

Introduction to leg pain

Leg pain is one of the most common medical complaints, affecting people of all ages and lifestyles. Often, leg pain is not a cause for serious concern, but in other cases it can be a sign of an underlying medical condition that requires attention.

Definition and prevalence

Leg pain is defined as a feeling of discomfort or unease that can be located in the muscles, joints, bones, or blood vessels of the lower extremities. It can be acute or chronic, mild or severe. Understanding its origin is the first step towards effective treatment. The prevalence is very high, ranging from pain in one specific leg to generalised pain in both legs.

The importance of understanding the causes

Understanding why your legs hurt is essential for a correct diagnosis and treatment. The causes of leg pain are complex, as they can be related to muscular, circulatory or neurological problems or, in specific cases, to conditions such as lipoedema. My aim is to provide you with a clear and accurate guide so that you can identify the possible reasons behind your leg pain.

Common causes of leg pain

The origin of leg pain can be very diverse. Most of the time, it is related to everyday factors, but it is vital not to rule out other causes.

Muscle cramps

A cramp is an involuntary and painful contraction of a muscle. It is one of the most common causes of leg muscle pain. People often ask themselves, ‘Why do my legs hurt in bed?’ or ‘Why do my legs hurt at night?’ Night cramps are very common and can be related to a number of factors.

Dehydration

Not drinking enough water can lead to muscle cramps, as hydration is crucial for proper muscle function.

Electrolyte imbalance

A lack of potassium, magnesium or calcium, minerals that are essential for muscle function, can cause leg pain.

Muscle fatigue

Overuse of muscles, such as after intense exercise, can cause pain in the leg muscles and cramps.

Muscle and bone injuries

Pain in one or both legs can be the result of a traumatic injury or overuse.

Muscle tears

A common injury, especially in athletes, causing severe leg pain and significant limitation of movement.

Stress fractures

Common in runners or people who suddenly increase their physical activity. Microfractures in the bones can cause leg pain that worsens with activity.

Tendinitis and sprains

Inflammation of the tendons or ligaments can cause pain along the leg that worsens with movement and is often associated with swelling.

Circulatory problems

Veins and arteries play a crucial role in leg health. When blood circulation is not working properly, it can manifest as leg pain.

Peripheral arterial disease

The narrowing of arteries due to plaque buildup reduces blood flow, causing leg pain when walking that improves with rest. Patients often report ‘pain in the inside of the legs’ or a cramping sensation.

Deep vein thrombosis

A blood clot in a deep vein can cause severe pain in the left or right leg, swelling, and redness. It is a medical emergency that requires immediate attention to prevent serious complications.

Varicose veins

These are enlarged veins that can cause a feeling of heaviness or burning in the legs and, in some cases, continuous leg pain.

Underlying medical conditions

Sometimes, leg pain is a symptom of a broader disease.

Arthritis and gout

Joint inflammation can cause pain in the leg or foot, limiting mobility and well-being.

Neuropathies, including diabetes

Damage to the nerves can cause sensations such as tingling and numbness, intense leg pain, and pain in the legs and feet. Thigh pain at rest can be a symptom of neuropathy.

Bone and skin infections

Infections such as osteomyelitis or cellulitis can cause pain in the extremities, swelling, and fever.

Less common but serious causes of leg pain

Although the above causes are the most common, there are others that, although less common, are important to consider.

Bone tumours

Although rare, bone tumours can be a cause of leg pain.

Heavy leg syndrome

This sensation is related to circulatory problems and, in the context of my speciality, is a very characteristic symptom of lipoedema, a chronic disease of the adipose tissue that affects almost exclusively women. If you experience severe leg pain along with disproportionate leg size, it is essential that you consider the possibility of lipoedema. For more information, please visit the section on lipedema symptoms on my website.

Legg-Calve-Perthes disease

This childhood disease affects the hip and can manifest as pain in the leg or knee.

Sciatic nerve pain

Compression of the sciatic nerve in the lower back can cause severe pain in the legs, tingling, and muscle weakness. Patients often report that they cannot walk after sitting or that the pain prevents them from walking.

Symptoms associated with leg pain

Leg pain rarely occurs on its own. Paying attention to accompanying symptoms is key to a correct diagnosis.

Tingling and numbness

These may be indicative of neuropathy or nerve compression. This sensation should be evaluated by a professional.

Heaviness or burning sensation

These are common symptoms in circulatory problems and lipoedema. Patients with this condition often tell me, ‘My legs hurt and burn’ or ‘My legs are on fire.’

Changes in skin colour or temperature

Redness, paleness, or coldness are signs of serious circulatory problems such as DVT or PEA.

Muscle weakness

If, in addition to leg pain, you feel that your legs are failing you, it may be a symptom of a nerve or muscle problem that requires attention.

Diagnosis of leg pain

An accurate diagnosis requires professional evaluation.

When to seek medical attention

Although many leg pains resolve with rest, you should see a specialist if you experience:

Sudden, severe pain

Especially if accompanied by swelling, redness, or fever.

Swelling and redness

These signs may indicate an infection or blood clot.

Fever and general malaise

These are signs that the pain may be caused by a systemic infection.

Persistent pain despite home care

If you are wondering ‘what to take for leg pain’ and over-the-counter pain relievers are not working, it is a sign that the problem may be more serious.

Medical evaluation process

As a specialist, my diagnostic process is based on scientific rigour:

Detailed medical history

I analyse the type of pain (whether it is pain in the thighs at rest, pain in the legs when climbing stairs, etc.), its duration, the factors that make it worse, and the patient’s medical history.

Complete physical examination

I assess the affected area, temperature, presence of swelling, and nerve and muscle response.

Additional tests

Depending on the findings, I may request Doppler ultrasounds to assess circulation, MRIs for muscle and bone health, or blood tests to detect other problems. In the case of lipedema, the diagnosis is clinical, but additional tests help rule out other conditions. If your legs are painful and the pain has become a constant concern, do not hesitate to seek the opinion of a specialist. Lipedema is one of the most underdiagnosed causes of chronic leg pain, so it is vital to have a professional who can recognise your symptoms. If you would like to learn more about the diagnosis of lipedema, you can visit this section of my website.