Geniusas crystallizes the fundamental methodological principles that underlie phenomenological research. On the basis of those principles, he offers a phenomenological clarification of the fundamental structures of pain experience and contests the common conflation of phenomenology with introspectionism. Geniusas analyzes numerous pain dissociation syndromes, brings into focus the de-personalizing and re-personalizing nature of chronic pain experience, and demonstrates what role somatization and psychologization play in pain experience. In the process, he advances Husserlian phenomenology in a direction that is not explicitly worked out in Husserl’s own writings.