Doing it gradually is the best approach. I built up to 2.5 after a few months of just messing around. It never really gave me a headache that I can recall, but I don't get headaches very often either.
I think the best approach for me is to keep this one on the shelf of "novel but not to be done". It will live between my ability to cross one eye at a time at the cost of spotty vision and migraines an hour later, and flexing my back just right to pop a rib out of place which looks amusing but hurts for days
The goal is to attain liberation in the body, by sealing in the energy of bindu in the head so that it is not lost.
Haṭha yoga is a branch of the largely spiritual practice of yoga, though it makes use of physical techniques; it was developed in medieval times, much later than the meditative and devotional forms of yoga. Its goals however are similar: siddhis or magical powers, and mukti, liberation. In Haṭha yoga, liberation was often supposed to be attainable in the body, made immortal through the practices of Haṭha yoga. Among its techniques were mudrās, meant to seal in or control energies such as kundalini and bindu. Khecarī mudrā is one such technique.
tl;dr - A spiritual practice of yoga in Hindu metaphysics.
Why not? No real reason other than a novelty and it's easier to get the dried-on mucus off in the morning or the rare occasion when I'm sick.
It's also easier to get popcorn kernels unstuck from my back of my throat when that happens and easier to extract tonsil stones without using my finger or a different oral tool.
Also, as I've replied to other comments, I've got a slightly higher mucus production than most people seem to naturally have. So it helps to not have to blow my nose as often.
To a degree at least, just got gratually better over the last few years without deliberate stretching or severing anything.
Altho I mostly use it to get slime out of my throat instead of caughing.
Now just tried it to get up to my nose, nothing there at the moment.
I guess I am almost at the "third stage" distance wise.
It helps to exhale quickly to get the meatflap out ontop of the thongue. (Second picture)
I've did research if one could choke on their own thongue several times, because I was worried that it would "fall down there" or get stuck or sth, like a dislocated jaw or a scrotum torsion or sth.
I haven't had a frenulum since infancy (believe it or not, from a near fatal teething incident) and have always been able to do this. I used to frak people out by making my tongue disappear while I was a kid.
Your mileage may vary for sure. I naturally produce more mucas than most people, but not an obscene amount or anything. I don't remember it ever starting to hurt after I did it unless I ate acidic or spicy food recently though.
I've never given myself a sinus infection in the 10 years I've been doing this, but others might?
I naturally produce more mucus than most people anyway. I'm not really sure, maybe it's minor dust allergies? It generally makes things easier for me to manage.
This is second hand info, I'm nowhere near limber or big enough, but I saw a comment from someone who allegedly was able to self fellate. Apparantly the overall impression is that it is more like sucking dick than getting your dick sucked. I'm not implying that it's a bad thing, just know what to expect before committing to a rigorous training regiment with that goal in mind. Or whatever, you do you. 😏
I've seen people in videos online that could do it. I'm not there yet and I'm not sure I ever will or really want to be. It'd be a neat party trick if I could.
Imagine if someone with a bifurcated tongue did it and had one coming out of each nostril.
Question, would this make being sick and congested better? Could you keep your nose clean of the stuff you can't blow out normally? Or is that a closed sinus issue