Leg Pain: Causes, Symptoms & When to See a Doctor

Leg pain can be caused by muscle strain, joint problems, poor circulation, sciatica, or nerve damage. The exact location of the leg pain, whether it affects one or both legs, and whether it improves with rest can help identify the cause.

Leg pain that does not improve with rest may be linked to circulation problems such as peripheral vascular disease, while pain that spreads from the lower back may suggest sciatic nerve compression or spinal conditions. Other common causes include arthritis, cramps, overuse injuries, pregnancy-related changes, and growing pains in children.

Diagnosis of leg pain may involve a physical exam, blood tests, or imaging tests such as X-rays or MRI to confirm the source of discomfort. Treatment depends on the cause and may include rest, warm compresses, physiotherapy, medications, compression stockings, or medical care for more serious conditions like thrombosis.

Main causes

Some of the main causes of leg pain include:

1. Muscle or tendon abnormalities

Leg pain originating from the bones or muscles usually doesn’t follow typical nerve pathways and tends to worsen with leg movement. Possible underlying causes include myositis, tenosynovitis, a calf abscess, or fibromyalgia.

Muscle pain can develop after repetitive physical activity, such as an intense workout or wearing uncomfortable shoes. In these situations, the pain usually appears toward the end of the day and often feels like “leg fatigue.” Another common cause of muscle-related leg pain is cramping, which typically occurs at night and may also be frequent during pregnancy.

Calf pain can sometimes indicate compartment syndrome, a condition that causes severe pain and swelling. Symptoms typically appear 5 to 10 minutes after physical activity and may leave the affected area sore for an extended period. Shin pain, on the other hand, is often caused by inflammation of the anterior tibial tendon (tendonitis), which is common among athletes and people who train intensely, especially long-distance runners.

What to do: Take a warm bath, then lie down with your legs elevated to promote better blood circulation and reduce fatigue. Rest is important, though complete bed rest isn’t necessary. Instead, try to avoid strenuous exercise or heavy physical activity. If tendonitis is diagnosed, applying ice and using a topical anti-inflammatory ointment can help the inflammation heal more quickly.

2. Joint problems

Leg pain may be caused by orthopedic conditions such as arthritis, especially in older adults. Joint problems often produce additional symptoms, including joint pain and morning stiffness, typically lasting about 15 minutes after waking. The pain may not occur every day, but it usually worsens with physical activity and improves with rest.

A knee deformity may be a sign of osteoarthritis, while redness around the joints usually indicates arthritis. Knee pain can also develop after a fall or as a result of hip injuries or a leg length discrepancy.

What to do: Apply a warm compress to the affected joint (such as the knee or ankle) for about 15 minutes. It’s also advisable to consult your primary care provider or an orthopedic surgeon, as you may benefit from anti-inflammatory medication or physical therapy.

3. Spinal abnormalities

When leg pain gets worse with spinal movement, it may indicate a problem involving the vertebrae. Spinal canal stenosis can cause a moderate to severe feeling of heaviness or cramping in the lower back, buttocks, thighs, or legs during walking. The pain typically improves only when sitting down or leaning forward. Numbness or tingling may also occur.

Spondylolisthesis is another possible cause of back pain that radiates into the legs. This pain often feels like a heavy pressure in the lower back, worsens with walking, and improves with rest. A herniated disc can also cause back pain that spreads to the legs, producing a sharp, intense pain that may extend to the glutes, the back or sides of the legs, the ankles, or even the soles of the feet.

What to do: Apply a warm compress to the painful area to help relieve symptoms. Your provider may also recommend anti‑inflammatory medications and physical therapy.

4. Sciatica pain

When leg pain stems from sciatic nerve issues, it often radiates from the lower back through the glutes and down the back of the thigh. You may also feel tingling or leg weakness. The pain can be sharp and piercing, or sudden and electric, starting in the lower back and extending into the lower extremities.

What to do: Apply a warm compress to the painful area and leave it in place for about 20 minutes. Avoid physical activity and lifting heavy objects in the meantime. Your physical therapist may also recommend specific  sciatica stretches to help relieve discomfort.

5. Poor circulation

Leg pain from poor circulation most often affects older adults. It can happen anytime but typically worsens after long periods of sitting or standing. Swelling and purple discoloration in the feet and ankles may also occur, signaling poor blood return to the heart.

According to the American Heart Association, peripheral artery disease (PAD) can reduce blood flow to the legs and cause leg pain during walking (claudication), along with other changes such as skin color changes or slow-healing sores.

A more serious complication is deep vein thrombosis (DVT), where a blood clot blocks circulation in a vein. According to the CDC, DVT most often forms in the lower leg, thigh, or pelvis and can lead to a life-threatening pulmonary embolism if part of the clot travels to the lungs. Pain is typically localized to the clot site and you may have trouble moving your foot. DVT can develop after surgery or from using hormonal birth control without medical supervision.

What to do: Lying on your back with your legs elevated for 30 minutes can help relieve symptoms. Your doctor may also prescribe medications to improve circulation and recommend compression stockings. If you suspect a blood clot (thrombosis), go to the hospital immediately.

6. Growing pains

Leg pain in children or adolescents often stems from rapid bone growth, typically between ages 3 and 10, and is a benign condition. Pain usually centers around the knee but can extend down the entire leg to the ankle. It commonly occurs at night before bedtime or after intense physical activity.

What to do: Place ice cubes in a sock or plastic bag and apply it directly to the painful area for 10-15 minutes. Caregivers can also gently massage the area using a moisturizing cream or almond oil while encouraging the child to rest. There is no need to stop physical activity entirely; just reduce its intensity or frequency.

7. Pregnancy

Leg pain is a very common and normal symptom during pregnancy. It often occurs early on due to increased estrogen and progesterone, which dilate leg veins and boost blood volume in the legs.

Later, the growing fetus and added body weight can compress the sciatic nerve and inferior vena cava, leading to leg swelling.

What to do: To relieve this discomfort, lie on your back with your knees bent (this stretches the spine). You can also rest with your legs elevated.

8. Lipedema

Lipedema involves excessive fat buildup, often in the legs, and is associated with symptoms such as swelling, mild to severe leg pain, a heavy feeling in the legs, or pain in the feet or joints.

Excessive fat buildup in the legs can result from genetic factors, hormonal changes, or obesity, for example.

What to do: Treatment should be guided by a vascular surgeon and focus on relieving symptoms while improving quality of life. Recommendations may include lymphatic drainage, physiotherapy, compression stockings, physical activity, or an anti-inflammatory diet.

In more serious cases, or when other treatments fail, a doctor may recommend liposuction to remove excess fat and improve mobility. Bariatric surgery may also be an option for obesity with a BMI above 35 kg/m².

When to see a doctor

Consult a healthcare provider if leg pain becomes severe or is accompanied by other symptoms, such as:

• Intense pain localized to one spot;

• Calf stiffness;

• Fever;

• Very swollen feet or ankles;

• Suspicion of a fracture;

• Inability to walk or work.

Report the pain's intensity, when it started, and what you've tried for relief. Your provider may order tests to guide treatment, which could include physical therapy or medications.