Aim: To introduce metacognition as an educational technology for learning self-care. In order to achieve this goal, it discusses the prevention of lymphedema after breast cancer surgery. Method: Reflexion paper based on philosophical and theoretical reasoning in adition of empirical evidence to support the use of metacognition for self care learnig. It states that using metacognitive resources as educational technology may promote more effective both teaching-learning process, stimulates critical and reflexive thinking, increasing conscious and autonomous decision-making. Results: The characteristics of metacognition and self-care interpenetrate. In addition metacognition has been beneficial in other disorders and diseases. Final considerations and implications for practice: It was concluded that the metacognitive approach, used as technology, opens wide possibilities for nursing in its teaching-learning actions for self-care, making them more effective, resulting in the empowerment of women, specifically enabling clients to make decisions, making the process more conscious, deliberate and autonomous.