Dr Thor Timothy
MBBS (Singapore), M.Med (Anaesthesiology), FIPP (USA), FFPMANZCA (Australia and New Zealand), EDPM (Europe)
Lower back pain is a common occurrence, but when it starts to travel down your leg, it can feel different and more concerning. You may notice a sharp or burning sensation that extends from your lower back into your hip, thigh or even your foot. For some, it comes with tingling, numbness or weakness that makes everyday movements uncomfortable.
This type of pain is often linked to nerve irritation. Rather than being confined to one spot, it follows a pathway, which is why it feels so different from typical muscle soreness. Understanding what could be causing this type of discomfort is an important step towards finding relief.
Sciatica and Nerve Compression
One of the most recognised causes of radiating leg pain linked to lower back pain is sciatica. This occurs when the sciatic nerve, the longest nerve in the body, becomes irritated or compressed. It runs from the lower spine through the buttocks and down each leg, which explains the travelling nature of the pain.
You may notice symptoms such as tingling, numbness or weakness alongside the discomfort. Some people describe it as a shooting sensation that worsens when sitting or coughing. While the term sciatica is often used broadly, it is not a condition on its own but rather a sign that something is affecting the nerve.
Herniated or Slipped Disc
Between the bones of your spine are soft discs that act as cushions. When one of these discs bulges or ruptures, it can press on nearby nerves. This is commonly referred to as a slipped or herniated disc. When this happens in the lower back, it can irritate the sciatic nerve roots. You may feel a deep ache in your back that gradually extends into one leg. Certain movements, such as bending forward or lifting, may also aggravate the symptoms.
Arachnoiditis
Arachnoiditis is a less common but more complex condition involving inflammation of the arachnoid, one of the membranes surrounding the spinal cord. This inflammation can affect the nerves in the lower back and lead to persistent discomfort.
People with arachnoiditis may experience burning or stinging lower back pain that radiates down the legs. In some cases, the sensations can feel unusual, such as tingling or a crawling feeling under the skin. Symptoms may be ongoing and can vary in severity, which makes early evaluation important for proper management.
Piriformis Syndrome
Not all nerve-related pain originates directly from the spine. In some cases, the issue lies in the muscles surrounding the sciatic nerve. The piriformis muscle, located deep in the buttock, sits close to this nerve.
If the muscle becomes tight or inflamed, it can compress the nerve and produce symptoms similar to sciatica. You may feel discomfort in the buttock that travels down the back of the leg, especially after prolonged sitting or physical activity.
Radiculopathy
Radiculopathy refers to a condition where a nerve root in the spine becomes compressed or irritated. It is often the underlying reason behind lower back pain that radiates into the leg, including cases commonly described as sciatica.
Depending on which nerve is affected, you may experience pain, tingling, numbness or weakness along a specific pathway in the leg. The symptoms can vary in intensity and may worsen with certain movements such as bending or twisting.
Spinal Stenosis
Spinal stenosis refers to the narrowing of spaces within the spine, which can place pressure on nerves. This condition often develops gradually over time. You may find that pain worsens when standing or walking for long periods, while sitting or leaning forward brings some relief. The discomfort can spread into both legs and may feel like heaviness or fatigue.
Finding the Right Support with Dr Thor Timothy
Living with nerve-related back pain can affect how you move and function each day. It can make even simple activities feel like a challenge. At our pain specialist clinic, Dr Thor Timothy and his team focus on identifying the source of your pain and tailoring care to your needs.
If your lower back pain is radiating down your leg or not improving as expected, schedule a consultation to explore your options and take a step towards relief.
Meet Our Pain Specialist in Singapore
Dr Thor Timothy, Anuntapon Chutatape
Dr Thor Timothy, Anuntapon Chutatape is an anaesthesiologist and pain specialist dedicated to helping patients find relief from acute and chronic pain without surgery. He was previously the Director of Acute Pain Services at Singapore General Hospital and has received advanced training in interventional pain medicine internationally. Dr Thor is a Fellow of Interventional Pain Practice (FIPP, USA), a Fellow of the Faculty of Pain Medicine of the Australian and New Zealand College of Anaesthetists (FFPMANZCA) and a Fellow of the Academy of Medicine Singapore (FAMS). He also holds the European Diploma of Pain Management (EDPM).
