For a recent morning backache, you can consider an over-the-counter pain reliever like acetaminophen for pain relief, or a nonsteroidal anti-inflammatory drug (NSAID) such as ibuprofen or naproxen to help with both pain and stiffness, provided you have no stomach or kidney issues. Applying a warm compress for 15 minutes in the morning can also help relax tight muscles, and a firm mattress or adjusting your sleeping posture may prevent further discomfort. If the pain does not improve after a week, worsens, or is accompanied by leg numbness or weakness, please consult a doctor for a personalized evaluation.