Maybe. It’s no secret an uncomfortable bed can make it harder to fall asleep or disrupt your sleep during the night. If your mattress sags, it can cause pain that keeps you awake. If it’s too firm, the pressure can distract you and prevent you from falling asleep. If it’s too bouncy, your partner can wake you up moving around at night. Whatever the problem with your mattress, if it’s keeping you up, it’s time to spring for a new one.