Śivasaṃhitā 5.107

The image of the sun as a source of poison is striking but internally consistent within tantric body cosmology. The inner sun generates heat (agni) which, without proper containment or counterbalance, becomes viṣa (poison) — an energy that consumes and exhausts rather than nourishes. This is precisely why haṭhayogic tradition places such emphasis on practices designed to cool or equilibrate the solar channel.

Piṅgalā derives from piṅga, meaning ‘tawny’ or ‘reddish-gold’ — colors directly associated with fire and solar energy. That the continuously exuding solar poison flows through this nāḍī is no coincidence: unbalanced solar energy is understood as inherently destructive, manifesting as disease, mental agitation, and premature physical deterioration when left unchecked.

This teaching carries direct practical implications for prāṇāyāma. Techniques such as left-nostril breathing (candra bhedana) or śītalī (cooling breath) are specifically designed to counteract excess piṅgalā energy. The doctrine of solar poison flowing through this channel thus underpins an entire yogic therapeutics oriented toward restoring balance between the lunar and solar currents within the subtle body.