Sciatica

What is sciatica?

Sciatica is the name for pain caused by irritation or compression of the sciatic nerve, the longest nerve in the body, which runs from the lower back, through the buttocks, and down each leg. When something presses on or irritates this nerve, it causes pain that travels along its path — typically felt radiating from the lower back or buttock down the back of one leg, sometimes as far as the foot.

Sciatica is a symptom of an underlying issue affecting the nerve, rather than a condition in itself. It is common, and while it can be quite painful and limiting, the good news is that most cases improve on their own within a few weeks with simple self-care. Understanding what causes it and how to manage it helps most people recover and reduces the chance of it returning. Only a minority of cases need more involved treatment.

Symptoms

The hallmark of sciatica is pain that follows the path of the sciatic nerve, usually affecting one side. The nature of the pain can vary. Common symptoms include:

• •Pain radiating from the lower back or buttock down the back of one leg
• •Pain that can be sharp, burning, or shooting
• •Tingling or a pins-and-needles sensation in the leg or foot
• •Numbness in the affected leg or foot
• •Weakness in the affected leg
• •Pain that may be worse when sitting, coughing or sneezing

Causes

Sciatica happens when the sciatic nerve is compressed or irritated, and several things can cause this. Identifying the cause can help guide treatment, though often sciatica settles regardless. Common causes include:

• •A slipped (herniated) disc pressing on the nerve — the most common cause
• •Narrowing of the spinal canal in the lower back (spinal stenosis)
• •Wear-and-tear changes in the spine with age
• •A back injury
• •Less commonly, other conditions affecting the lower back or nerve

Treatment and relief

Most sciatica improves within a few weeks, and the mainstay of treatment is self-care that keeps you moving. Although it may feel counterintuitive when in pain, staying gently active and continuing normal activities as much as possible is now recommended over bed rest, which can actually slow recovery. Gentle exercises and stretches for the back and legs can help, and a physiotherapist can advise on suitable ones.

For pain relief, over-the-counter painkillers can help, though a pharmacist or doctor can advise on what is most suitable, as some common painkillers are more effective than others for nerve pain. Applying heat or cold packs may ease discomfort. For sciatica that is severe, persistent, or not improving with these measures, a doctor can offer further options, which may include specific medicines for nerve pain, physiotherapy, or in a minority of cases procedures or surgery to address the underlying cause. Most people, however, recover with conservative self-care.

Recovery, prevention and warning signs

Recovery from sciatica is usually a matter of weeks, though it can sometimes take longer, and staying active throughout tends to help. Once recovered, some measures can reduce the chance of sciatica returning: maintaining good posture, lifting correctly (bending the knees and keeping the back straight), staying physically active with exercises that strengthen the back and core, and maintaining a healthy weight all support back health and reduce strain on the spine.

While most sciatica is not serious and settles with self-care, certain warning signs need urgent medical attention because they can indicate a more serious problem affecting the nerves. These include numbness around the genitals, buttocks or inner thighs (the saddle area), loss of control of the bladder or bowels, or significant weakness in the legs. This combination can signal a rare but serious condition called cauda equina syndrome, which is a medical emergency requiring immediate care.

Aside from these emergency signs, you should also see a doctor if sciatica is severe, is not improving after a few weeks, keeps returning, or follows a serious injury. For the great majority of people, though, sciatica is a painful but temporary problem that resolves with staying active, pain relief and time. Knowing the reassuring norm alongside the warning signs allows you to manage it confidently while seeking urgent help in the rare situations that need it.