There is no fastest solution for leg numbness and lumbar pain, and the treatment should be targeted according to the cause of the disease. There are many diseases that cause numbness and lumbar pain, including lumbar disc herniation, lumbar spinal stenosis, lumbar muscle strain, etc. The treatments include physical therapy, medication, minimally invasive treatment, surgery, and so on. 1. Physical therapy: including electrotherapy (such as ionic introduction), heat therapy (such as hot packs, microwave heat therapy), acupuncture, massage and so on. Patients with lumbar disc herniation, lumbar spinal stenosis, lumbar muscle strain, etc. can be relieved of pain through the above therapies, which can soothe the tendons and activate the blood, dredge the meridians and channels, and promote local blood circulation. 2. Drug therapy: mainly use anti-inflammatory and analgesic drugs, such as diclofenac sodium. 3. Minimally invasive treatment: those with lumbar disc herniation can eliminate the protruding nucleus pulposus by ablating or removing the nucleus pulposus, so as to relieve the compression on the nerves. Lumbar spinal stenosis can be relieved of compression through foramenoscopy. 4. Surgery: When the above methods are ineffective, surgery can be chosen for patients with surgical indications. Leg numbness and back pain may also have other causes such as lumbar spondylolisthesis, lumbar spondylolisthesis, etc. It is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment.