Many diseases can cause back and leg pain, among which lumbar disc herniation is the most common, which is also a common disease plaguing young people. How to use the easiest way to self-judge whether it is a lumbar disc herniation when it comes to back pain? Method 1: If you cough, if your back and leg pain worsens, you may have a lumbar disc herniation. The pain of this disease is caused by the herniated lumbar disc compressing the nerve roots; when coughing, sneezing or forceful stooling, the pressure in the abdomen rises, the abdominal venous blood refluxes to the spinal venous system and the pressure in the spinal canal rises, and the nerve roots suffer from the increased pressure of the lumbar disc and the pain worsens. Method 2: Whether there is lameness in walking. The lumbago that occurs after an acute lumbar sprain may be a lumbar disc herniation or a simple lumbar sprain, but the former will have a limp while the latter will not. This is due to the fact that when lumbar disc herniation is severe, the affected lower extremity protectively shortens the touching time due to increased pain when touching the ground and exhibits a limping gait. It is important to note that a limping gait is not always due to lumbar disc herniation, but other diseases can also present a limping gait. Method 3: Pain is not relieved after resting in the supine position. In the acute phase of lumbar disc herniation, resting on a hard bed is a very necessary measure to keep the pain from worsening. But at this time there is still pressure in the nucleus pulposus of the lumbar disc, so the pain is not completely relieved. Research shows that the pressure in the nucleus pulposus is different in different positions and activities: 30 kg in supine position, 70 kg in standing position, 85 kg in walking, 110 kg in coughing, 110 kg in bouncing, 120 kg in laughing, and the maximum pressure in the nucleus pulposus is 340 kg when bending 20 kg, so patients with lumbar disc herniation should absolutely avoid bending and bearing weight; and the lowest pressure in the nucleus pulposus is in back swimming, so The best way to exercise the body after the acute phase is swimming. Method 4: In prone position, ask family members to use their thumbs to press the lumbar vertebrae in the middle and 2 to 3 cm on both sides of the lumbar painful area, and the lumbar pain is obviously aggravated and radiates to the lower limbs or even the feet for lumbar disc herniation. This is a more accurate method to check lumbar disc herniation. Method 5: Take the supine position, straighten both legs on the bed, then sit up, if the lower limbs flex the knee joint due to pain, then it is lumbar disc herniation. This is due to the nerve roots on both sides of the spine being pulled upward during sitting up, the herniated lumbar disc stimulates the nerve roots, and the knee joint is flexed protectively due to pain. Method 6: Supine position with the affected joint straightened; elevate the affected limb with the assistance of family members, if the limb is restricted in elevation due to obvious pain and the angle between the limb and the bed is less than 70 degrees, then it is a lumbar disc herniation. This is because the nerve roots are pulled downward during the elevation process, the herniated lumbar disc irritates the nerve roots, and the height of the affected limb is limited by the pain to lift the leg.