Mala Agni

There are three mala agnis governing the three excreta. Each is located in the kala (membranous structure) that surrounds the channels of elimination:

• Mutra agni — governs urine excretion, operating in the bladder and urinary system. It maintains the glomeruli threshold, acid-alkali balance of urine, and specific gravity of urine.
• Purisha agni — governs fecal excretion, absorbing liquids and minerals, forming well-shaped stools, and maintaining fecal temperature. It gives color to stools: yellow if pitta, dark for vata, and pale in the case of kapha.
• Sveda agni — governs sweat, regulating body temperature, maintaining moisture, softness, oiliness, and acid-alkali balance of the skin, and helping govern the water-electrolyte balance in the body.

Mala agni is the local fire residing in the membranes of the organs of elimination. It governs the formation and discharge of waste products through their respective channels.