Low back pain is one of the most common conditions physical therapists treat. If you've felt pain that starts in your lower back and travels down your leg, you're not alone, and it can be frustrating, limiting and confusing. One of the most frequent questions we hear is "Is my pain coming from a muscle or a nerve?" Understanding the difference is the first step toward the right treatment and real relief.
Two main causes of low-back related leg pain
Low-back related leg pain typically comes from one of two sources: muscle or joint irritation, or nerve compression. The symptoms can seem similar, but the patterns are different.
Muscle and joint pain
This happens when the muscles, joints or discs in your lower back become irritated or strained. The pain often:
- Spreads into the buttock or upper leg
- Feels dull, achy or sore
- Changes with movement (bending, sitting, standing, lifting)
- Does not follow a clear path down the leg
- Does not include numbness or tingling
Common triggers include prolonged sitting, heavy lifting or sudden increases in activity.
Nerve pain (radicular pain or sciatica)
Nerve pain is caused by irritation or compression of one of the nerves in your lower back, commonly due to a herniated disc or spinal stenosis. The pain typically:
- Follows a specific path down the leg
- May reach the calf or foot
- Feels sharp, burning, electric or tingling
- Can include numbness or weakness
Nerve pain can be more intense and often interferes with daily activities like walking, bending or standing.
How to tell the difference
Use these simple questions as a guide:
| Question | More likely muscle or joint | More likely nerve |
|---|---|---|
| What does the pain feel like? | Dull, achy, sore | Sharp, burning, tingling |
| Does it move around or follow a straight path? | Moves around | Clear path down the leg |
| Is there numbness, tingling or weakness? | No | Yes |
What you can do to feel better
For muscle and joint pain
- Gentle movement
- Flexibility and mobility exercises
- Strengthening of the core, hips and glutes
- Posture and movement retraining
These help reduce stiffness, improve load tolerance and restore normal movement.
For nerve pain
- Nerve gliding exercises
- Activity modification
- Anti-inflammatory management
- In severe cases, injections or a surgical consultation
Early intervention speeds recovery, especially when numbness or weakness is present.
Red flags: when to seek immediate care
Call your healthcare provider right away if your leg pain comes with:
- Loss of bladder or bowel control
- Severe or rapidly worsening weakness
- Numbness in the groin or saddle region
These symptoms may indicate a medical emergency that needs urgent evaluation.
Take control of your low back and leg pain
Understanding why your pain is happening helps you choose the right treatment and avoid making the problem worse. Whether your symptoms are muscle-related or nerve-related, the good news is that most cases improve with the right combination of movement, strengthening and guidance.
If you have persistent or worsening back or leg pain, a Kauno physical therapist can help identify the root cause and build a customized treatment plan to get you moving comfortably again.
Back pain running down your leg? Let's find out what's causing it.
book a sessionthe takeaway
Dull, achy pain that moves around is usually muscle or joint. Sharp, burning pain that follows a path, with numbness or weakness, points to a nerve. Most cases improve with movement, strengthening and guidance, but loss of bladder or bowel control needs urgent care.
Frequently asked questions
How do I know if my leg pain is from a muscle or a nerve?
Muscle or joint pain tends to feel dull and achy, moves around and doesn't include numbness or tingling. Nerve pain tends to feel sharp, burning or tingling, follows a clear path down the leg and can include numbness or weakness.
What causes nerve pain down the leg?
Irritation or compression of one of the nerves in your lower back, commonly due to a herniated disc or spinal stenosis.
What helps nerve pain from the low back?
Nerve gliding exercises, activity modification and anti-inflammatory management. In severe cases, injections or a surgical consultation may be needed.
When is back and leg pain an emergency?
Seek care right away if your pain comes with loss of bladder or bowel control, severe or rapidly worsening weakness, or numbness in the groin or saddle region.
References
Silva AM, Amundson L, Bittencourt NFN, Hofstetter CP, Sharma A. Low back-related leg pain: A narrative review on the clinical criteria for patient classification and diagnosis. J Orthop Sports Phys Ther. 2023;53(2):1-40. doi:10.2519/jospt.2023.11320.
