Sciatica can improve for weeks and then return just when it seemed to be under control. It reappears with that pain that radiates from the lumbar region down to the glute or leg, sometimes after many hours of sitting, a specific exertion, or even for no apparent reason.
When it happens, it is normal to think that the problem never fully went away. And, in a way, that may be true: often the pain subsides before the factors irritating the nerve have been fully corrected, such as a herniated or bulging disc, weak muscles, too many hours in the same posture, stress, poor sleep, or a combination of several elements.
The fact that sciatica returns means that the nerve is still sensitive and that it is worth understanding what is triggering it. In this article, we will look at why flare-ups recur, what the most frequent triggers are, and what you can do to make each episode less intense and less disabling.
What is sciatica?
Sciatica is not a disease in itself, but a type of pain that appears when the sciatic nerve, or one of the nerve roots that form it, becomes irritated or compressed.
This nerve originates in the lower back and travels down the glute, the back of the leg, and in some cases, all the way to the foot. That is why sciatica does not usually stay only in the lumbar region. It can be felt as pain, burning, tingling, cramping, sharp stabs, or weakness in one leg.
The important thing is to understand that sciatica does not always hurt in the same way or for the same reason. Sometimes it is related to a herniated or bulging disc, that is, a spinal disc that protrudes and irritates the nerve. Other times it appears due to narrowing of the spine, muscle tension, degenerative changes, or a combination of several factors. If you want to know the cause of your sciatica, consult our article How to identify the cause of your sciatica.
Why does sciatica return?
Sciatica usually returns because the pain can subside before the causes irritating the nerve have been fully corrected. In other words, a flare-up improving is one thing, but it is another for the area to have regained enough strength, mobility, and tolerance to handle daily life again.
Sometimes a herniated disc remains and continues to take up space, even if it is less inflamed. Other times there is narrowing in the spine, joint wear, or changes due to the passage of time that leave the nerve roots with less margin. Weak hip and abdominal muscles can also play a role, forcing the lumbar region to work harder than it should.
