How to solve this problem with sculpting?

Question

Blender

Problem in Sculpting mode in Blender 2.82.7
I'm a beginner, so I may not understand elementary things. help me please...

When I take a brush called Draw Sharp and start brushing it over an object, in some places the brush makes the object go down, and in some places it pulls it out. What is it connected with?

Screenshot of the problem

If anything, I spent the entire line on the object holding Ctrl and Left Mouse Button (Left mouse button)

Answer 1

Maybe it's the geometry of the donut. In edit mode, press 1 (not on our pad), then press A (select all vertices), then alt M, then By distance. These actions will remove duplicate vertices.