Described herein are systems and methods for providing a breathing biofeedback session utilizing thermal measurements. In one embodiment, a system includes at least one inward-facing head-mounted thermal camera (CAM) that takes thermal measurements of a region below the nostrils (THROI) of a user. THROI are indicative of the exhale stream. Optionally, each CAM is located less than 15 cm from the user's face and above the user's upper lip, and does not occlude any of the user's mouth and nostrils. Optionally, THROI include thermal measurements of at least first and second regions below right and left nostrils of the user. The system also includes a user interface configured to provide feedback, calculated based on THROI, as part of a breathing biofeedback session for the user. Optionally, the system includes a computer that calculates the feedback.