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What Causes Sciatica to Flare Up? – 9 Common Culprits

Sciatica is a prevalent health condition that causes pain and discomfort in the lower back, buttocks, and legs due to the compression of the sciatic nerve. Mostly, the symptoms of sciatic pain vary, and some people may experience occasional flare-ups while others suffer from recurrent episodes.

Typically, millions of people experience sciatic nerve flare-ups, but what causes sciatica to flare up? 

The most common culprits of this pain  include herniated discs, spinal stenosis, degenerative disc disease, pregnancy, prolonged sitting, heavy lifting, and emotional stress. Therefore, understanding what aggravates sciatica can help manage the symptoms and avoid potential aggravators.

Whether you experience sciatica pain occasionally or continuously, this article can help you reduce the symptoms. We will walk through the common sciatica triggers, immediate treatments, and tips to prevent this  discomfort. Let’s get started!

What Causes Sciatica to Flare Up? – Root Causes 

The symptoms of sciatica vary from person to person, and sciatica flare-up can be particularly painful and debilitating. Here are the most common triggers of sciatica nerve flare-up; 

1- Prolonged Sitting

Sitting for long periods of time exacerbates sciatica symptoms by placing pressure on the lower back and hips. This is especially true if the chair is uncomfortable or does not provide adequate lumbar support.

2- Lifting Heavy Objects

Lifting heavy objects incorrectly leads to a sudden strain on the lower back, leading to a flare-up of sciatica symptoms. It’s important to use proper lifting techniques to avoid putting unnecessary stress on the lower back.

3- Poor Posture

Poor posture can cause stress and strain on the lower back, leading to sciatica flare-ups. It’s important to maintain good posture when sitting, standing, and walking to prevent unnecessary pressure on the lower back.

4- Lack of Exercise

A sedentary lifestyle can contribute to sciatica flare-ups, as exercise helps to strengthen the muscles in the lower back and improve flexibility. All this helps reduce the risk of sciatica flare-ups.

5- Obesity

Being overweight or obese puts extra strain on the lower back, exacerbating sciatica symptoms. Losing weight through diet and exercise can help to reduce the frequency and severity of sciatica flare-ups.

6- Trauma

Trauma to the lower back, such as a car accident or fall, can also be a cause of sciatica flare-ups. It’s important to seek medical attention if you experience a sudden onset of sciatica symptoms after a traumatic event.

7- Psychological Stress

Stress and anxiety is the core cause of  muscle tension and tightness, leading to sciatica flare-ups. Practicing relaxation techniques such as deep breathing, meditation, or yoga can help to reduce stress and tension in the muscles.

8- Inactivity

Inactivity is another major reason for sciatica flare-ups. Sitting or lying down for extended periods can cause the muscles in your back to weaken and increase pressure on the sciatic nerve. To manage sciatica caused by inactivity, try to incorporate more physical activity into your daily routine. Walking, swimming, and cycling are all great low-impact exercises that can help relieve sciatica pain.

9- Herniated Discs

Herniated discs are a common cause of sciatica flare-ups. When the soft tissue inside the discs in your spine bulges out and presses on the sciatic nerve, it can cause intense pain. Herniated discs can be caused by age-related wear and tear, trauma to the spine, or poor posture. To manage sciatica caused by herniated discs, your doctor may recommend physical therapy, pain medication, or surgery in severe cases.

Other Factors That Can Contribute to Sciatica Flare-Ups

Besides the primary causes of sciatica like a herniated or bulging disc in the spine, there are several other factors that can contribute to sciatica flare-ups. Here are 5 such factors; 

  1. Age: As we age, the discs in our spine become less flexible and more prone to damage. This can increase the risk of sciatica, especially in people over the age of 50.
  1. Weight: Excess weight can put pressure on the spine and increase the risk of disc herniation. This can lead to sciatica, particularly if the excess weight is carried around the midsection.
  1. Occupation: Jobs that involve heavy lifting, prolonged sitting or standing, or twisting of the back can increase the risk of sciatica. People who work in jobs that require repetitive motions may also be at a higher risk of developing sciatica.
  1. Sedentary Lifestyle: A sedentary lifestyle can weaken the muscles in the back and legs, leading to an increased risk of sciatica. Lack of exercise can also lead to weight gain, which can further exacerbate the problem.
  1. Smoking: Smoking can reduce blood flow to the spinal discs, making them more vulnerable to damage. It can also impair the healing process, which can make sciatica symptoms worse.

What to Do When Sciatica Flares Up?

When sciatica flares up, there are several things you can do to alleviate the pain and discomfort. Here are some tips to help you manage a sciatica flare-up:

  • Rest: It is important to rest and avoid activities that may aggravate the condition.
  • Ice or heat therapy: Applying ice or heat to the affected area can help to reduce inflammation and alleviate pain. Use ice for the first 48 hours after the flare-up and then switch to heat therapy.
  • Stretching exercises: Gentle stretching exercises can help to alleviate pain and improve flexibility. Try stretching the piriformis muscle, which is often involved in sciatica pain.
  • Over-the-counter pain medications: Over-the-counter pain medications such as acetaminophen, ibuprofen, and naproxen can help to reduce pain and inflammation.
  • Physical therapy: A physical therapist can help to develop an exercise program that is specifically designed to help alleviate sciatica pain.
  • Chiropractic care: Chiropractic adjustments can help to realign the spine and reduce pressure on the sciatic nerve.
  • Acupuncture: Acupuncture can help to relieve pain and improve circulation.
  • Surgery: In rare cases, surgery may be necessary to alleviate the pain and discomfort of sciatica.

How to Prevent Sciatic Pain Flare Ups? 

Sciatica flare up causes severe pain and may prove debilitating in some severe conditions. While it may not always be possible to completely prevent them, there are certain lifestyle changes that can help reduce the frequency and intensity of these episodes. Here are some tips to help prevent sciatica flare-ups:

  1. Exercise Regularly: 

Regular exercise can help keep your back muscles strong and flexible, which can reduce the risk of sciatica flare-ups. Low-impact exercises like walking, swimming, and cycling are great options. It’s important to start slowly and gradually increase the intensity and duration of your workouts.

  1. Maintain a Healthy Weight: 

Being overweight can put extra pressure on your back and increase the risk of sciatica flare-ups. Maintaining a healthy weight through a balanced diet and regular exercise can help reduce this risk.

  1. Practice Good Posture: 

Poor posture can strain your back muscles and increase the risk of sciatica flare-ups. Try to maintain good posture while sitting, standing, and walking. When sitting, make sure your feet are flat on the floor and your back is straight. When standing, keep your shoulders back and your weight evenly distributed on both feet.

  1. Take Breaks When Sitting for Long Periods: 

Sitting for long periods can increase the pressure on your lower back and trigger sciatica flare-ups. Take breaks every 30-60 minutes to stand up, stretch, and move around.

  1. Use Proper Lifting Techniques: 

Lifting heavy objects improperly can strain your back muscles and increase the risk of sciatica flare-ups. When lifting, bend at the knees and keep your back straight. Hold the object close to your body and avoid twisting.

  1. Wear Supportive Shoes: 

Wearing shoes with good arch support and cushioning can help reduce the impact on your back when walking or running. Avoid wearing high heels, which can put extra pressure on your lower back.

  1. Manage Stress: 

Stress can cause muscle tension and increase the risk of sciatica flare-ups. Practice relaxation techniques like deep breathing, meditation, or yoga to help manage stress.


So, what causes sciatica to flare up? Basically, sciatica flare-ups can be caused by a variety of factors like herniated discs, poor posture, muscle imbalances, obesity, stress, and inactivity. And to manage sciatica, it is important to identify the underlying cause of your pain and work with your doctor to develop a personalized treatment plan. 

Nothing can help you unless you’ll upgrade your daily lifestyle habits, as these habits contribute a lot in sciatic nerve flare ups. However, it is possible to manage sciatica and enjoy a more active, pain-free life with the right approach. 


What causes sciatic nerve pain to flare up?

Sciatic nerve pain can flare up due to a variety of reasons, including injury, herniated discs, spinal stenosis, degenerative disc disease, and pregnancy. The nerve can also become irritated by excessive sitting or standing, lifting heavy objects, or sudden movements. Inflammation and pressure on the nerve can exacerbate the pain, as well as certain lifestyle factors such as being overweight or leading a sedentary lifestyle.

How long does a sciatica flare up last?

Mild flare-ups may only last a few days, while more severe cases can last several weeks or even months. However, the duration of a sciatica flare-up can vary from person to person, and depends on the severity of the condition. And it’s important to seek medical attention if the pain persists or worsens, as prompt treatment can help alleviate symptoms and prevent further complications.

Can stress cause sciatica?

While stress is not a direct cause of sciatica, it can contribute to the development or exacerbation of sciatica symptoms. Stress can lead to muscle tension and tightness in the lower back and buttocks, which can put pressure on the sciatic nerve and cause pain, numbness, or tingling sensations. Additionally, stress can worsen inflammation in the body, which can also contribute to sciatica symptoms. Therefore, it is important to manage stress as part of an overall approach to treating sciatica.

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