What to do if i have muscle spasm on my thighs and feeling of numbness. how can i cure it?

Radiculopathy: Your symptoms may reflect a lumbar radiculopathy (nerve symptoms due to a pinched nerve in your lumbar spine). In most cases conservative treatment works - physical therapy, medications, spinal injections - but in some cases it does take surgery for resolution. See your doctor for further evaluation to nail down the diagnosis and treatment options.