Friends can prick saliva, that is, put your tongue up and prick it with salivary glands. How to do this? Ask for advice.

I know the method, but it may not be successful, because I developed it myself. At first, you just stick out your tongue and press the salivary gland. Stick to the surface of the tongue until it is dry, then put your tongue up, let go of the salivary glands, and saliva will come out automatically, plus some sour candy. Especially sour devil candy can stimulate the salivary gland, make him secrete a lot of saliva, practice it repeatedly for a few days, then change the step of spitting out the tongue to spit out the tongue actively, push the ceiling with the tip of the tongue, that is, pull the tendon under the root of the tongue hard, and practice more after finding the feeling, and it will be OK; Yes, you can ask me if you don't understand. Hoping to be adopted alone.