Hello, Thank You for the query at HealthcareMagic Your symptoms are possibly suggestive of muscle strain. There are few things to follow to help relieve your symtoms -Use heat compress to relax muscles and relieve strain -Take Ibuprofen,if not allergic for pain -Make sure you are sit appropriately in comfortable chair while feeding your baby -Try not to carry around heavy weights. While lifting your baby up, bend the knees first instead on stooping down at your back. -Do not wear heals as it can increase muscle strain.Wear comfortable flat shoes. If still the pain continues/worsens or if you develop pain/tingling/numbness in thighs and legs, please follow up with your doctor to rule out disc problems/sciatica. Hope I was able to help you Please address any more concerns Regards, Dr.Lekshmi