If the palate itches, so to speak, but many describe that the ear itches, you just need to put your finger in your ear, rest your tongue against the palate and exhale with your mouth, uttering an incomprehensible sound "kkhkhrkhkhkhkrrr", while wiggling the ear, like dangling a finger.
If your hand is numb, after it, so to speak, "lying down", you just need to stand up straight, clench your fist several times, and shake it. The pain and incomprehensible "noise" from the hand will go away :)
I hope my comment is not very funny, but it really helps: D
When hiccupping, drink water, but it's enough just to make a few swallowing movements.
Unfortunately, I don't know anything else, I'll be glad to read other answers