A spring mattress usually lasts between six and ten years, depending on its quality and how well it is used. Over time, the metal springs inside can start to lose their shape and strength. When this happens, the mattress may not give your body the support it needs. You might notice sagging in the middle or feel the springs pressing under the surface. These are signs that the spring mattress is wearing out. If you start waking up with back pain or feel tired even after sleeping, your mattress might be the reason. Regular use, weight, and how often you rotate the mattress can also affect how long it lasts. To make your spring mattress last longer, use a proper bed frame and avoid jumping or putting heavy pressure on it. You should think about replacing your spring mattress when it no longer feels comfortable or shows clear signs of damage. A good mattress helps you sleep better and feel fresh in the morning, so replacing it at the right time is essential for your health and comfort.