Pinching upper lip to alleviate cramps?

Factual Questions
1

Probably an old wives tale or something. Once my mom told me that pinching your upper lip really hard (as in place your hand so that the thumb and fore finger were horizontal and squeeze inwards horizontally) can release muscle cramps.

I tried that a few times, and for whatever reason, it did indeed seem to help cramps go away a bit quicker.

Of course, it’s entirely possible that I’m just misjudging the timing, trying to convince myself that it helps for whatever reason, and in reality, it’s just some sort of placebo.

So, I ask - is there anything behind that at all?

2

It’s an acupressure technique.

Some detail a bit down the linked page.

3

I too seem to have some relieve from this technique. Of course, that doesn’t prove anything, I know. But at least you know you aren’t the only one.