A nurse fulfills many roles including caregiver, clinical decision maker, advocate, case manager, rehabilitator, comforter, communicator, teacher, and leader. As a caregiver, the nurse helps clients regain their health through the healing process and preserves their dignity. As a clinical decision maker, the nurse uses critical thinking and collaborates with the healthcare team and clients. The nurse protects clients, asks about allergies, and ensures their legal and human rights are upheld.