Symptoms of sciatica

summary

Sciatica is a common disease, which is caused by the compression of sciatic nerve. The sciatic nerve is composed of several different spinal nerves, including the fourth and fifth lumbar nerves and the first to third nerves. This nerve extends from the waist through the buttocks to the back of the thigh, the calf and the foot. When the sciatic nerve is compressed, the nerve will appear pain, causing symptoms of sciatica. Although the sciatic nerve originates from the waist, most patients with sciatica will not complain about low back pain. Pain is more common in the arm, thigh or leg, but not in the leg.

Symptoms of sciatica

The symptoms worsen when you sit up. Walking or standing for a long time will also aggravate the pain. Coughing, sneezing, or defecating can exacerbate the pain. On the contrary, the symptoms subside when you lie down.

Intervertebral disc is located between the vertebrae, its main function is to make the upper and lower vertebrae move. There are two main parts of the intervertebral disc, the outer part is fiber wrapped, wrapped in the nucleus pulposus. Nucleus pulposus changes position with the activity. The nucleus pulposus moved forward during extension; On the contrary, the nucleus pulposus moved backward when it was bent forward.

The main symptom of sciatica is that patients usually complain that when they wake up in the morning, the pain of waist, thigh or leg is aggravated. One hour after getting up, the pain will gradually ease.

matters needing attention

When repeatedly bending forward for a long time, the nucleus pulposus moves backward, which pulls the posterior annulus fibrosus. As the pressure continues, the annulus will crack. As a result, the nucleus pulposus overflows from the ruptured annulus fibrosus. When the herniated disc touches the lumbar nerve, the nerve becomes inflamed, causing pain.