If your Kubernetes pod stays in a pending state, it usually indicates a scheduling issue. This problem often arises due to insufficient resources such as CPU or memory, or because the pod cannot be allocated to a node due to specific constraints. Common causes include overused resources, incorrect resource requests, or network issues preventing the pod from running. Other factors might involve image pull errors or hostPort limitations. To resolve this, check the pod's resource requirements, debug the node’s capacity, and ensure network traffic is correctly configured. Using tools like Stackify Retrace can help monitor and diagnose these issues effectively.