The problem list is a supplementary tool that accompanies the distress thermometer. It allows patients to identify specific issues contributing to their distress. These issues are categorized into different domains such as practical (e.g., financial issues), family (e.g., family health problems), emotional (e.g., anxiety, depression), spiritual/religious (e.g., loss of faith), and physical (e.g., pain, fatigue). This comprehensive list helps in pinpointing the exact sources of distress.