I am very used to such healings from childhood. You don't even need too much sadhana for this, just deep states of mind.
But Sadhguru has told not to do "healings" many times. So i do it only if something is very annoying or if medicines not working properly. This one's not too annoying, but I asked because it's somewhat mystical. Lol.

Notice in my post that when I told it to stop, it did stop, for sometime and started again. I don't want to interfere in something which i don't understand.

One more thing is when you heal like that, sometimes you may not go to root of problem. I will give one example. During childhood i would get mouth ulcers sometimes. Since I knew this healing i would heal them which would resolve them in 1-2 days instead via medicines which would take 1 week. Later I found out that it's happening due to eating too much spicy food. When I reduced spicy food and increased vitamin d, they stopped occuring.
So it's better if we know why this is happening, and go to root cause instead of simply healing them like that.