Pain shooting down the back of your leg can be worrying.
For many people, it starts as a mild ache in the lower back before gradually spreading into the buttock, thigh or even the foot. Others wake up one morning with sudden pain that makes walking, sitting or even getting dressed difficult.
One of the biggest misconceptions about sciatica is that it is a diagnosis in itself. In reality, sciatica simply describes irritation of the sciatic nerve or the nerve roots that form it. The important question is why that irritation is occurring.
Understanding the source of the problem is often the first step towards finding lasting relief.
Sciatica usually affects one side of the body, although symptoms can vary considerably from person to person.
Common symptoms include:
For some people, the back pain is mild, while the leg pain becomes the main problem. Others notice that coughing, sneezing or sitting for long periods makes their symptoms significantly worse.
The sciatic nerve is the largest nerve in the body and is formed by several nerve roots that leave the lower lumbar spine before travelling down the leg.
In many cases, sciatica develops because one or more of these nerve roots becomes irritated. This can happen for a variety of reasons, including disc injuries, age-related changes in the spine, inflammation or reduced movement in the joints of the lower back.
Prolonged sitting is another common contributor. Spending hours sitting each day increases the load placed on the lumbar discs and surrounding tissues, which may aggravate an already sensitive nerve.
Inflammation can also influence symptoms. While inflammation is a normal part of the healing process, lifestyle factors such as poor sleep, chronic stress, smoking and a diet high in ultra-processed foods may contribute to a more persistent inflammatory state in some individuals, potentially making irritated nerves more sensitive.
Although the lumbar spine is the most common source of sciatica, it isn’t always the only factor involved.
The pelvis, hips and even the ankle all work together every time we walk. If movement is reduced in one area, another often has to compensate.
For example, persistent stiffness in the ankle after an old sprain can subtly change the way you walk. Over months or years, this may alter the forces travelling through the knee, hip and lower back. In some people, these changes contribute to increased stress on the lumbar spine, making symptoms more likely to develop.
This is one reason why we assess how your whole body moves rather than focusing only on where the pain is felt.
The lumbar spine does much more than simply support your body weight.
It contains the nerve roots that provide sensation, muscle control and reflexes to the legs. When these nerves become irritated, the brain often interprets the pain as coming from the leg, even though the source of the irritation is actually in the lower back.
This is why someone can experience severe pain in the calf or foot despite having very little back pain at all.
The joints of the lumbar spine also play an important role in distributing forces throughout the pelvis and lower body. When these joints become stiff or don’t move efficiently, the surrounding muscles often compensate, increasing tension and placing additional stress on nearby tissues.
While most cases of sciatica improve with appropriate treatment and time, certain symptoms require urgent medical assessment.
You should seek immediate medical attention if you experience:
These symptoms are uncommon but can indicate a more serious condition requiring urgent treatment. We will ask you about these symptoms in our clinic and refer you out if needed.
If pain travelling into your leg is affecting your work, exercise or everyday life, it may be worth looking beyond the painful area itself.
At The Third Space in Amsterdam-Oost, we perform a thorough chiropractic examination of your lower back, pelvis and the way your body moves to identify the factors that may be contributing to irritation of the sciatic nerve.
Because while sciatica often presents as leg pain, the underlying cause is frequently found higher up—and understanding why the nerve has become irritated is often the first step towards helping you move comfortably again.
