"Masz coś na ból brzucha?"

Translation: Do you have something for a stomach ache?

[jmwozniak]

The English here is not quite right

[Tom873317]

Agree, should be "for a stomach ache"

[JohanLindh4]

"Stomach ache" is a condition, not an object. Remove the "a".
"Do you have something for stomach ache?"

[NeilWallac1]

Shouldn't these be accepted also?
do you have something for a sore stomach?
do you have something for a stomach ache?

[NeilWallac1]

alternatives....
do you have something for a sore stomach?
do you have something for a stomach ache?

[karaluh]

"belly" is not accepted.

[Jeanette364461]

Given brzuch is belly, bellyache should be an option here.

[Jellei]

OK, added.

[akikotsukamoto]

Is "have you got something for stomackpain?" wrong?

[karaluh]

It's "stomach pain", not "stomackpain".