Brush tool problem.

[Magali_029]

Hi everyone, i have a little problem here and i don't know how to fix it.
The point is that i re-installed photoshop cc today, and while i started to use the brush tool, it seems that the lines are not smooth as before, i tried everything i know (i´m new with this, so basically is not that much) but didn't work. I also tried to change the settings of my tablet and the brush itself, but nothing.
A little help please?.