Symptoms A-Z

Weakness in One Lower Leg Symptoms, Causes & Common Questions

Understand your weakness in one lower leg symptoms, including 10 causes and common questions.

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10 Possible Weakness In One Lower Leg Causes

The list below shows results from the use of our quiz by Buoy users who experienced weakness in one lower leg. This list does not constitute medical advice and may not accurately represent what you have.

Fibular nerve injury

The fibular nerves are also known as the peroneal nerves. Fibular nerves run from the lower spine all the way down the back of the leg, ending at the heel. If the fibular nerves are damaged or compressed, this can result in a condition known as foot drop.

The fibular nerves can be damaged through surgery, especially hip replacement or total knee replacement; any injury to the knee or low back; or neurologic diseases such as multiple sclerosis or Parkinson's disease.

Foot drop means that the person is unable to flex the foot upward from the ankle, because the fibular nerves that control this voluntary movement have been damaged. There may also be pain, numbness and weakness in the foot, and difficulty walking.

Diagnosis is made through physical examination, nerve conduction studies, and imaging such as x-ray or MRI.

Treatment involves using orthotics, which are specially made shoes, supports, and braces for the foot; physical therapy; and sometimes surgery to decompress or otherwise help repair the nerve.

Rarity: Uncommon

Top Symptoms: pain in the distribution of fibular nerve, numbness in fibular nerve distribution, difficulty walking or weakness with foot dorsiflexion

Urgency: Wait and watch

Herniated (slipped) disk in the lower back

The backbone, or spine, is made up of 26 bones called vertebrae. In between the bones are soft disks filled with a jelly-like substance. These disks cushion the vertebrae and keep them in place. Although people talk about a slipped disk, nothing actually slips out of place. The outer shell of the disk ruptures, and the jelly-like substance bulges out. It may be pressing on a nerve, which is what causes the pain.A slipped disk is more likely to happen due to strain on the back, such as during heavy lifting, and older individuals are at higher risk.

Rarity: Common

Top Symptoms: lower back pain, moderate back pain, back pain that shoots down the leg, back pain that gets worse when sitting, leg weakness

Urgency: Primary care doctor

Chronic idiopathic peripheral neuropathy

Peripheral neuropathy refers to the feeling of numbness, tingling, and pins-and-needles sensation in the feet. Idiopathic means the cause is not known, and chronic means the condition is ongoing without getting better or worse.

The condition is most often found in people over age 60. Idiopathic neuropathy has no known cause.

Symptoms include uncomfortable numbness and tingling in the feet; difficulty standing or walking due to pain and lack of normal sensitivity; and weakness and cramping in the muscles of the feet and ankles.

Peripheral neuropathy can greatly interfere with quality of life, so a medical provider should be seen in order to treat the symptoms and reduce the discomfort.

Diagnosis is made through physical examination; blood tests to rule out other conditions; and neurologic and muscle studies such as electromyography.

Treatment involves over-the-counter pain relievers; prescription pain relievers to manage more severe pain; physical therapy and safety measures to compensate for loss of sensation in the feet; and therapeutic footwear to help with balance and walking.

Rarity: Rare

Top Symptoms: distal numbness, muscle aches, joint stiffness, numbness on both sides of body, loss of muscle mass

Urgency: Primary care doctor

Calf strain

A strain, commonly called a "pulled muscle," is when a muscle becomes overstretched, and microscopic tears occur. A calf strain happens when one of the muscles on the back of the lower leg is pulled.

Rarity: Common

Top Symptoms: pain in one calf, moderate calf pain, calf pain, sports injury, soccer injury

Symptoms that always occur with calf strain: pain in one calf

Urgency: Self-treatment

Repetitive strain injury of the calf

Repetitive strain injury of the calf is caused by consistent repetitive use.

Rarity: Uncommon

Top Symptoms: lower leg numbness, calf pain from overuse

Symptoms that always occur with repetitive strain injury of the calf: calf pain from overuse

Symptoms that never occur with repetitive strain injury of the calf: recent calf injury, severe calf pain

Urgency: Self-treatment

Weakness In One Lower Leg Symptom Checker

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Restless legs syndrome (rls)

Restless leg syndrome (RLS) is a chronic condition characterized by uncomfortable sensations while lying down and a strong urge to move the legs. Leg movement relieves the unpleasant sensations temporarily, often resulting in poor quality sleep. RLS is co...

Diabetic neuropathy

Diabetic neuropathy is nerve damage caused by longstanding or poorly controlled diabetes mellitus (DM). Other risk factors for developing diabetic neuropathy include obesity, smoking, cardiovascular disease, and abnormal lipid levels.

Diabetic neuropathy can present as a number ...

Stroke or tia (transient ischemic attack)

Transient ischemic attack, or TIA, is sometimes called a "mini stroke" or a "warning stroke." Any stroke means that blood flow somewhere in the brain has been blocked by a clot.

Risk factors include smoking, obesity, and cardiovascular disease, though anyone can experience a TIA.

Symptoms are "transient," meaning they come and go within minutes because the clot dissolves or moves on its own. Stroke symptoms include weakness, numbness, and paralysis on one side of the face and/or body; slurred speech; abnormal vision; and sudden, severe headache.

A TIA does not cause permanent damage because it is over quickly. However, the patient must get treatment because a TIA is a warning that a more damaging stroke is likely to occur. Take the patient to the emergency room or call 9-1-1.

Diagnosis is made through patient history; physical examination; CT scan or MRI; and electrocardiogram.

Treatment includes anticoagulant medication to prevent further clots. Surgery to clear some of the arteries may also be recommended.

Rarity: Common

Top Symptoms: dizziness, leg numbness, arm numbness, new headache, stiff neck

Symptoms that never occur with stroke or tia (transient ischemic attack): bilateral weakness

Urgency: Emergency medical service

Peripheral arterial disease (pad)

Peripheral artery disease is also called PAD, intermittent claudication, or vascular disease. The large main artery from the heart is the aorta, and its smaller branches are the peripheral arteries.

In PAD these peripheral arteries are blocked with plaque, which is debris that builds up in the lining of these arteries and eventually cuts off the blood flow.

Risk factors for PAD include smoking, high blood pressure, and diabetes.

PAD usually involves arteries that lead to the legs, but can affect any artery. Symptoms include numbness and pain in the legs, especially with exercise when more circulation is needed but the flow is blocked.

It is important to seek treatment for these symptoms. PAD can lead to increased risk of heart attack, stroke, and infection as well as to gangrene, a life-threatening medical emergency.

Diagnosis is made through patient history, physical examination, blood tests, and sometimes a treadmill test, MRI, and arteriogram.

Treatment involves medication and surgery to open or bypass blocked arteries, and lifestyle changes regarding diet, exercise, and smoking cessation.

Rarity: Common

Top Symptoms: leg numbness, spontaneous foot pain, decreased exercise tolerance, cold feet, thigh pain

Symptoms that never occur with peripheral arterial disease (pad): calf pain from an injury, thigh pain from an injury

Urgency: Primary care doctor

Multiple sclerosis (ms)

Multiple sclerosis, or MS, is a disease of the central nervous system. The body's immune system attacks nerve fibers and their myelin covering. This causes irreversible scarring called "sclerosis," which interferes with the transmission of signals between the brain and the body.

The cause is unknown. It may be connected to a genetic predisposition. The disease usually appears between ages 20 to 50 and is far more common in women than in men. Other risk factors include family history; viral infections such as Epstein-Barr; having other autoimmune diseases; and smoking.

Symptoms include numbness or weakness in arms, legs, or body; partial or total loss of vision in one or both eyes; tingling or shock-like sensation, especially in the neck; tremor; and loss of coordination.

Diagnosis is made through patient history, neurological examination, blood tests, MRI, and sometimes a spinal tap.

There is no cure for MS, but treatment with corticosteroids and plasma exchange (plasmapheresis) can slow the course of the disease and manage symptoms for better quality of life.

Rarity: Rare

Top Symptoms: severe fatigue, constipation, numbness, decreased sex drive, signs of optic neuritis

Urgency: Primary care doctor

Questions Your Doctor May Ask About Weakness In One Lower Leg

To diagnose this condition, your doctor would likely ask the following questions:

  • Do you currently smoke?
  • Have you ever been diagnosed with diabetes?
  • Did you just suffer from a high impact injury (e.g., a fall, collision, accident or sports trauma)?
  • Do you have a history of high cholesterol?

The above questions are also covered by our A.I. Health Assistant.

If you've answered yes to one or more of these questions

Take a quiz to find out what might be causing your weakness in one lower leg

Weakness In One Lower Leg Symptom Checker Statistics

People who have experienced weakness in one lower leg have also experienced:

  • 5% Loss Of Muscle Mass
  • 5% Foot Numbness
  • 5% Pain In One Calf

People who have experienced weakness in one lower leg were most often matched with:

  • 57% Chronic Idiopathic Peripheral Neuropathy
  • 42% Herniated (Slipped) Disk In The Lower Back

People who have experienced weakness in one lower leg had symptoms persist for:

  • 36% Over a month
  • 23% Less than a day
  • 19% Less than a week

Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

Weakness In One Lower Leg Symptom Checker

Take a quiz to find out what might be causing your weakness in one lower leg

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.