Lumbosacral strain is a medical term for an injury that causes low back pain. The lumbosacral area (low back) is between the bottom of the ribcage and the top of the buttocks. A strain is tearing of muscles and tendons. These tears can be very small but still cause pain.
Muscles and tendons connected to the spine can be strained in a number of ways:
Sitting or standing in the same position for long periods of time. This can harm the low back over time. Poor posture can make low back pain more likely.
Moving the muscles and tendons past their usual range of motion. This can cause a sudden injury. This can happen when you twist, bend over, or lift something heavy. Not using correct technique for sports or tasks like lifting can make back injury more likely.
Accidents or falls
Lumbosacral strain can be caused by other problems, but these are less common.
Symptoms may include:
Pain in the back, often on one side
Pain that gets worse with movement and gets better with rest
Inability to move as freely as usual
Swelling, slight redness, and skin warmth in the painful area
Low back pain often goes away by itself within several weeks. But it often comes back. Treatment focuses on reducing pain and avoiding further injury. Bed rest is usually not recommended for low back pain. Treatments may include:
Avoiding or changing the action that caused the problem. This helps prevent injuring the tissues again.
Prescription or over-the-counter medicines. These help reduce inflammation, swelling, and pain. NSAIDs (nonsteroidal anti-inflammatory drugs) are the most common medicines used. Medicines may be prescribed or bought over the counter. They may be given as pills. Or they may be put on the skin a gel, cream, or patch.
Cold or heat packs. These help reduce pain and swelling.
Stretching and other exercises. These improve flexibility and strength.
Physical therapy. This usually includes exercises and other treatments.
Injections of medicine. This may relieve symptoms. The medicine is usually a corticosteroid. This is a strong anti-inflammatory medicine.
If these treatments don't relieve symptoms, your healthcare provider may order imaging tests to learn more about the problem. Sometimes you may need surgery.
If the cause of the pain is not addressed, symptoms may return or get worse. Follow your healthcare provider’s instructions on lifestyle changes and treating your back.
Call your healthcare provider right away if you have any of these:
Fever of 100.4°F (38°C) or higher, or as directed by your rrovider
Numbness, tingling, or weakness
Problems with bowel or bladder control, or problems having sex
Pain that does not go away, or gets worse
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