I can't be the only one with this problem

I was always thinking it was lava, so i could make a nether portal

YoU ShOuLd Do A LaVa SwOrD! PrEsS Q To MiNe LaVa!

AlSo ReMeMbEr ThAt YoU nEeD a DiAmOnD PiCkAxE FoR ThAt!

I have too, so does my bröther

Glad I'm not alone

You most CERTAINLY are not! I get this problem all the time when I'm exploring caves! It's so annoying.