The word "itchy" is close, but is still a little weird.

Is “pressure on my bladder” too close to just saying it?

Full

Sometimes I want to piss even when my bladder is mostly empty

It feels like someone is inflating a balloon full of urine inside me

...and not in a good way

My teeth are floating is a common one where I'm from, or busting/bursting

Did you not upvoter your own comment??? Why?

My penis is hard?

"I need to drain the lizard."

Tingly. That’s my closest word for the feeling.

How to describe needing to piss without using the word piss.. It’s an anxiety attack.

When I was little, my dad told me it's called "bladder hurting".

When my cousin's three-year-old needs to use the toilet, she says "The wee wants to come out!"

Oh, I just realized that English didn't have a word for this.

We have word for both want to go number 1 and 2 in my native language.

I gotta take a leak so bad, I can taste it

Pressure? Whether it's inside the bladder, or elsewhere on the way out, I feel like it's always some kind of pressure.

BLADDER URGENCY

UNEXPECTED ITEM IN BAGGING AREA

This comment implies the existence of a good way I'm not quite sure I'm comfortable with

He lets the People decide

What are the words?

"I'm bursting." Is what we'd say round my way.
or "bustin" also.

It's Indonesian.

Kebelet = Pee
Mulas/mules = Poo

It's the colloquial meaning. The dictionary define kebelet as "yearn for" or "great desire" and mulas as "any stomach discomfort" but in 99% of our daily comfo it means we need to go to the bathroom.

Interesting! I yearn for a wee. I don’t necessarily desire to drop a deuce, but I am uncomfortable, so I will.