Cause of sudden sharp pain in lower back when bending over & it’s treatment

Last Updated on January 23, 2026 by Sunit. S. Ekka

Sudden sharp pain in the lower back when bending over could be a sign of a severe internal injury to the lower back. The potential cause could be lumbar disc bulge or spinal stenosis, the latter being the most common.

If you’ve experienced sharp lower lumbar pain when bending over, you know how debilitating it can be. While there may be less serious causes, like muscle strain, the pain is not as severe.

In this article, we’ll explore the root cause of this sharp pain that can cause you to become locked in a bent position and provide some tips to deal with this issue.

Sudden sharp pain in lower back when bending over could be slip disc

You may still remember a sharp pinch on your lower back when bending over. It may have been when you were trying to lift a bag from the floor or pick up your pen, sharp pain in your lower back, and you couldn’t make yourself straighten.

Although many everyday activities are harmless, adopting an incorrect posture or putting too much pressure on the lower back can result in pain.

The discomfort may reduce with time, but it often returns when we bend over to brush our teeth or perform other activities that involve lower back bending.

This indicates an internal injury to the lower back, known as a lumbar disc bulge (slip disc or prolapsed intervertebral disc). An MRI is the only way to confirm this.

What happens in slip disc?

Our spine/vertebral column is made up of 24 vertebral bodies. Between every two vertebral bodies, there is a soft gel-like structure known as the intervertebral disc. These discs are essential to making our spine flexible and movable.

They act like shock absorbers and absorb mechanical shock when we jump, run, bend, or twist ourselves. In our daily activities, bending over is common. However, some improper posture during bending over can result in injury to this intervertebral disc, resulting in a slipped disc.

The intervertebral disc comprises soft gel-like material enclosed under a hard, fibrous capsule. So, injury or tear to the disc causes the gel to come out and compress the nerves that pass by.

This condition is known as a slipped disc or prolapsed intervertebral disc that pinches the sciatic nerve in the lower back, causing significant discomfort.

The disc hernia passes through 4 stages of disc hernia, in the severe stage, it causes even more irritation on the sciatica nerve, resulting in the tingling sensation and pain in the low back that radiates down the back of the leg. We call this condition sciatica.

What happens when we bend forward?

Bending forward not only increases the pain but may also aggravate the internal damage that has been caused to the intervertebral disc.

With simple physics, we can understand what goes on inside the lower back when we bend forward. I want to remind you that we are discussing this in the context of back pain due to a disc hernia. Bending forward is a very natural movement, and in a normal individual, it’s never a cause of pain.

When we bend forward:

1. It causes the gap between two vertebral bones on the front side of the body to narrow and widen on the back side. The figure above shows the impact of bending on the disc.
2. The narrowing of the gap further pushes the already herniated disc and further reinforces the bulge.
3. This makes the disc compress more on the spinal cord root (sciatic nerve); hence, pain aggravates.

But when we bend backwards, the bulging disc tends to realign itself, which improves the pain. This explains why physiotherapist suggests exercises involving bending backwards.

Treatment for sharp pain when bending forward

So, how do you get rid of a sudden sharp lower back pain?

When you experience such shooting pain in the lower back when bending over, you should immediately take note of it. Visit your doctor as soon as possible to rule out any serious conditions of a disc bulge.

Take care of your back, avoid lifting heavy objects, and activities that involve jumping or sudden jerking. Take the following precaution, and it should heal spontaneously within a week.

• Take note of shooting pain in the lower back when bending over.
• Visit a doctor to rule out a severe condition of a disc bulge.
• Consider using a lumbar belt when driving or sitting for long hours.
• Homemakers are advised to avoid forward bending while performing household chores.
• The simple household activity modication can help avoiding forward bending.
• Perform easy exercises to strengthen the lower back muscles to prevent and cure pain in future.

Mild exercises for lumbar slip disc

Once you have started using the back pain belt, next comes the exercises. There are a few very easy yet very effective exercises to cure and prevent such pain in future. These exercises are aimed at strengthening the muscles of the lower back.

I would highly recommend going through this article and learning each exercise to cure this pain permanently: 6 Easy Diffuse Disc Bulge at l4-l5-S1 Exercises for Quick Relief. To summarise it, these exercises include:

1. Bridging exercise
2. Single leg raise in prone lying
3. Chest raise in prone
4. Cat and dog exercise
5. Leg raise in quadruped position
6. Hand and leg raise in quadruped position.

Few lifestyle modifications are also recommended, including

• Sciatica pain-getting out of bed safely & painless.
• 3 sleeping position for quick sciatica pain relief.

Final word

Fortunately, if you experience only sharp pain, then chances are your disc hernia is still in stage 1 (4 stages of slip disc), and if you follow the tips in this article, it should improve within a week.

If pain is not subsiding within a week, then you must consult your doctor without further delay.

Back pain from sciatica needs utmost care. Precaution such as not bending forward, using lumbar braces, and using of a special sciatica pillow is a must. Little care will take care of your pain.

Keep reading: Seven L5 S1 Exercises to Avoid with Bulging Lumbar Disc

Sunit. S. Ekka

The author is a physiotherapist who has been practising for the last 17 years. He holds a Bachelor's in Physiotherapy (BPT) from SVNIRTAR (Swami Vivekananda National Institute of Rehabilitation and Research), one of the prestigious physiotherapy schools in India.

Whatever he learns dealing with his patient, he shares it with the world through blogs and e-books. He also owns a YouTube channel, "Sunit Physiotherapist" with over 8 lakh active subscribers. Here, he shares everything he gets to learn serving the patient.