Instability (specifically in the lower back and pelvis region)

Pelvic instability most often occurs in pregnant women but can also result from trauma (e.g. in men). However, this is much less common, so we will mainly refer to pregnant women on this page.

This condition can be caused by instability in the different bones of the pelvis:

• The pubic bones at the front
• The sacrum at the back
• One ilium on each side

Symptoms and signs of pelvic instability

Symptoms can vary from person to person, but the following complaints are common:

• Pain in the lower back, abdomen, tailbone, side or back of the upper thigh
• Pain when lifting, carrying, or standing on one leg
• General physical condition is reduced
• Decreased mobility in the lower back
• Pain when maintaining a bent-over posture for a long time
• Start-up pain when getting up from a seated position
• Pain when sitting, standing, lying down, or walking for long periods
• A shifting or “giving way” feeling in the lower back during movement

Causes of pelvic instability

Pelvic instability can be caused by:

• Damage to the ligaments and joint capsules, which results in reduced stability
• Thinning of an intervertebral disc (due to ageing or a herniated disc)
• Weak or malfunctioning deep spinal muscles. This increases the load on the ligaments, capsules, and discs

Treatment and recovery from pelvic instability

The deep spinal muscles need to be trained to compensate for the instability. When these muscles are properly activated, they can help stabilise the pelvis. Through exercise, these muscles become stronger. Support from a physiotherapist or targeted exercises can significantly improve the condition. In addition, wearing a pelvic support belt can also be an effective aid to relieve symptoms and improve stability.