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What causes lower back pain?

You will not be surprised to know that one of the most common discomforts among the population is pain in the lower back. We could say that almost 90% of us suffer from it at some time of the day.

A bad posture in the chair, for example , results in this pain that can be punctual and disappear after a few hours or, on the contrary, rise as a chronic pain which is important to know the cause.

As you know, any discomfort in our body is a symptom of some underlying problem and, although in what refers to pain in the lower back is almost always due to a bad movement or posture , it is important to know other possible causes.

We explain them to you in the following article.

1. Pain due to muscle tension

This is, without doubt, the most common cause and the one that affects, as a rule, the youngest population between 30 and 60 years. It is when we are most active and, therefore, when we have the greatest risk of suffering some muscle strain.

It is caused by maintaining a bad posture for several hours, or by carrying a heavy object. Remember that the correct way to catch something from the ground is by bending the knees to harmonize the ascent with the back always straight.


  • Difficulty standing or walking.
  • Pain that goes from the groin to the buttocks and radiates the back of the muscles .
  • The pain is centered in the lower back as a “hot plate” that hurts even to the touch.

In general, muscle tension disappears with days of rest or a good massage.

2. Sciatica

Sciatica is another of the most frequent causes. However, in this case, the discomfort starts in the lower back and radiates the buttocks to the legs.

What we would notice would be the following:

  • Numbness and burning from the back to the leg. It is a constant pain that makes movement difficult.
  • The pain is more intense when we sit down.

We must bear in mind that the sciatic is the largest of the nerves of the body and has many terminations that start from the spine . Therefore, the pain can be very diffuse as well as limiting.

The problems of sciatica usually appear after 50 years and, in general, it resolves well without surgical treatments.

3. Spinal arthrosis or spondyloarthrosis

Although many think that the problem of osteoarthritis is associated with advanced age, there are cases in which this disease begins between 30 and 40 years, especially among women.

The spondyloarthrosis is the degeneration of the nucleus pulposus of the intervertebral disc. Lose thickness and density. If the disks of the spine remain thick and with gelatinous consistency, the movement will be harmonious and painless.

However, sometimes the discs wear out, thus decreasing the capacity for cushioning and support of the vertebrae. Disc degeneration appears and with it the pain.

According to medical data, almost 47% of healthy adults between 35 and 50 years have disc degeneration , hence those punctual pain in the lower back.

It is worth knowing what determines the appearance of this common problem:

  • It is important to maintain an adequate weight and lead an active life. Excessive loading can accelerate the degenerative process.
  • Do you smoke? Well then you should know that smoking accelerates disc degeneration. For that reason it would be convenient that we began to leave this habit so dangerous.
  • The degeneration of the discs has a high genetic weight. Almost 60% of the people who suffer it have inherited it from their parents.
  • Be careful also with the type of work we have. If we load weights throughout the day, the degeneration accelerates. It is important to maintain proper back hygiene to prevent these disabling problems.

4. An infection

One of the possible causes of low back pain is an infection associated with an organ located in the pelvis.

It is something that many do not know, because the most common is to associate this discomfort with some ailment related to the spine, muscles, nerves or other structures in that region of the back.

Now, something that we often overlook is that, at times, that intense burning in the lower back has its origin some kidney or gynecological problem that we should not neglect:

  • Pain in the lower back may be due to a kidney infection .
  • We can have some kidney stone.
  • Ovarian cysts or endometriosis also present with pain in the lower back.

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