Brief Answer:
Cauda equine syndrome

Detailed Answer:
hi the symptoms that you describe could be consistent with cauda equina syndrome.

Low back pain is very common. It affects millions of people. In most cases, you don't need surgery for low back pain. But in rare cases, severe back pain can be a sign of cauda equina syndrome (CES), a condition that usually requires urgent surgical treatment. People with cauda equina syndrome often are admitted to a hospital as a medical emergency. Here's what you need to know about cauda equina syndrome.

What Is Cauda Equina Syndrome?
Cauda equina syndrome is a rare disorder that usually is a surgical emergency. In patients with cauda equina syndrome, something compresses on the spinal nerve roots. You may need fast treatment to prevent lasting damage leading to incontinence and possibly permanent paralysis of the legs.

CES affects a bundle of nerve roots called cauda equina (Latin for horse's tail). These nerves are located at the lower end of the spinal cord in the lumbosacral spine. They send and receive messages to and from your legs, feet, and pelvic organs

These are the most common causes of cauda equina syndrome:

A severe ruptured disk in the lumbar area (the most common cause).
Narrowing of the spinal canal (stenosis).
A spinal lesion or malignant tumor.
A spinal infection, inflammation, hemorrhage, or fracture.
A complication from a severe lumbar spine injury such as a car crash, fall, gunshot, or stabbing.
A birth defect such as an abnormal connection between blood vessels (arteriovenous malformation).
Symptoms of Cauda Equina Syndrome
It may be hard to diagnose cauda equina syndrome. Symptoms vary and may come on slowly. They also mimic other conditions. If you have any of these symptoms, see your doctor right away:

Severe low back pain.
Pain, numbness, or weakness in one or both legs that causes you to stumble or have trouble getting up from a chair.
Loss of or altered sensations in your legs, buttocks, inner thighs, backs of your legs, or feet that is severe or gets worse and worse. You may experience this as trouble feeling anything in the areas of your body that would sit in a saddle (called saddle anesthesia).
Recent problem with bladder or bowel function, such as trouble eliminating urine or waste (retention) or trouble holding it (incontinence).
Sexual dysfunction that has come on suddenly.

if this describes your symptoms you should see a doctor urgently.

best wishes

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