What condition would cause lower back pain and a swollen left leg?

Get it checked. Low back pain is common as we are more sedentary and gain weight. However, your description of a lower extremity involvement may point to something serious like a pinched nerve or blood flow obstruction. Don't delay, see your doctor, he may recommend imaging studies like an mri.

Related Questions

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 which causes my left leg to go numb right behind the kneecap.

Nerve Impingement. Your lower back pain is likely caused by either a compressed nerve between two vertebrae in your low back, or a compressed nerve between two spasmed muscles. The sciatic nerve must travel through both of these anatomic structures en route to the legs on either side of the body. In absence of more concerning signs, it's often helpful to address potential muscle spasm with heat and NSAIDs first. Read more...
Back pain and leg. You are describing a nerve root compression syndrome at your lumbar spine region. Sciatica is a word often used to describe a similar syndrome. Sciatica typically indicates pain down the side of the leg. Your syndrome though is similar. Numbness reflects nerve root compression as the nerve comes out of the spine. You require special Rx: Physical Therapy, Pain management, perhaps lumbar injections. Read more...
L4 or unrelated. L5 and S1 nerve root impingement produces discomfort that radiates below the knee all the way to the foot. L4 root can produce numbness down to the knee but usually not just behind the knee. Baker's cysts and other problems behing the knee joint can produce numbness behaind the knee but are unrelated to back pain. To sort this all out you will need to undergo an assessment. Read more...

Can physical therapy help with my lower back pain and the sciatica in my left leg?

PT for low back pain. Hi MarijaM, Yes, physical therapy is often very helpful for low back pain and sciatica. Improving your flexibility and strengthening you back, hip, and abdominal muscles may help improve your symptoms. Even after physical therapy is complete, making these exercises a regular part of your fitness routine may help to prevent further episodes of back pain in the future. Good luck. - Dr. Sewick. Read more...
Hard to Say. Injections will give you pain relief early, but PT can be just as helpful but will take time to get relief. There is new research coming out that when you are in a lot of pain, you're body actually stops you from performing exercises so that you may not benefit from PT initially. So we believe that if you at least improve your pain first, you can then proceed with the exercise therapy programs. Read more...