Hopefully, you’ve been doing the immune breathing breath hold practice, rebalancing your CO2 and oxygen levels as well as optimizing nitric oxide, a very important component of our immune system.
Now, at the end of your breath hold, you can release with a hum into your sinuses, between your eyebrows. This area is actually a commonly used acupuncture point call Yintang, right above the pineal gland. Using your breath, you can stimulate it from the inside with humming.