Your meditation practice, and your pranayama practice help to cool the fire in the head. Generally the body switches between nostrils every 2 to 2.5 hours and the left nostril corresponds to the parasympathetic (rest and digest) system and the right to the sympathetic (fight or flight) system (PMID: 24741554) which one ‘should’ you be breathing through during your asana practice?
When we have a sensory overload, like being inside Sephora (when it was safe to be inside) it can lead to heat being locked in the head. Eating super spicy Indian food is the same heat trapping scenario as the perfume overload for the olfactory nerve. Heat locked in the head can lead to headaches, and heat in the digestive system can lead to constipation, indigestion, diarrhea.
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