I have sudden onset low back pain with radiation of pain down the leg, no injury. What's causing this?

Disk perhaps. A common cause would be a disk herniation (rupture, slip) in the low back. It can also be caused by nerve irritation by bone spurs in the low back. Less commonly, disk injury without herniation can also cause this type of symptoms. Often such problems will improve with time. Seek help if you have problems emptying your bladder or you have weakness in the leg muscles.
Pinched nerve. People often develop a pinched nerve in their back or neck for no reason. They often wake up with the symptoms and this is usually due to a bulging or herniated disc and is more common in younger folks. See a doctor if the pain is severe or you have weakness/numbness or bowel/bladder problems. You may need MRI if not better soon.

Related Questions

Would an MRI of lumbar w/o contrast show cause of inten low back pain, loss of blder control, numb low abdomn that touch sends strong ting. Down legs?

It is possible. but with the symptoms you describe you need to be evaluated immediately by a physician to rule out a correctable problem before it is permanent. Read more...
Here are some ... Imaging study with MRI is intended to show if there is anatomical structural "abnormality" which is rare in the young except ones with congenital or post-traumatic change. However, the degree of structural change is not always linearly proportional with functional changes, but at times disproportional. In your condition, it's likely in such condition or with some sort of neuropathy. More? Ask Doc. Read more...

What could cause lower back pain... I can feel tingles down the back of my left leg and it will go numb.

Nerve impingement. With tingling and numbness, it sounds as if you have a definite nerve issues. You most likely have your Sciatic nerve being compressed and that will cause your issues. Have the Dr. evaluate you and some radiology tests would be in order most likely. Nsaids and warm compresses to the back may help to start at this time,...Best wishes. Read more...

I have lower back pain on my right side that goes down butt check and leg. When I stand up I can barley walk and makes me stiff. And causes sharp pain?

Pinched Nerve. While there are many causes of leg pain , one of the most common causes is lumbar radiculopathy. This occurs when one of the nerves leaving the back gets compressed as it leaves the spine and travels down the leg. Compression may occur due to degenerative/bulging discs or arthritic bone spurs contacting the nerve. See your physician if these symptoms last longer than 2 weeks. Read more...
Radiculopathy. Sounds like pain from your back and effecting the nerve that goes into your leg. Would definitely have checked out. Read more...

Why could possibly be the cause of low back pain thus affecting my legs when I sit or stand foabout an hour or two. As well as twitching?

Disc herniation. You could possibly have a lumbar disc herniation which can cause "radiculopathy". This can present as pain, numbness or tingling from the back into the legs. A smaller disc herniation can usually be managed non-surgically. However, a larger disk herniation causing intractable pain and even weakness usually needs to be treated surgically. Read more...
Nerve damage. You could have a herniated disc, spinal stenosis, or some other type of spinal problem i would seek an exam by a physician. Read more...
Need exam. You could have a herniated disc, spinal stenosis, or some other type of spinal problem i would seek an exam by a physician. Read more...

What would cause lower back pain on the right side, also shooting pains down my spine into my legs?

Back pain. A problem in the lumbar spine, either a disc or a bone spur, can cause pain and radiating symptoms in the leg. This is something that requires a physical examination and consultation with a doctor. Read more...