Sudden back pain that feels like a nerve problem is often due to a muscle strain or irritation of a spinal nerve. It can happen from a wrong movement, lifting weights, poor posture, or even sleeping in an awkward position. Sometimes a slipped disc or nerve compression can also cause sharp or radiating pain, especially if it travels to the leg. Treatment depends on the severity. Pain relief medicines or muscle relaxants may be used, but they should be taken only if advised by your doctor after proper evaluation. Avoid self-medicating, as the cause needs to be understood first. You can start with simple care. Take a short rest but avoid complete bed rest, as gentle movement helps recovery. Apply a warm compress to relax muscles and reduce pain. Maintain proper posture and avoid bending or lifting heavy objects. Light stretching can help once pain starts improving. If pain is severe, radiates to the leg, or is associated with numbness or weakness, consult a doctor for further assessment and treatment.