I come across this issue very often. I am not very good at zbrush and when i am sculpting the bad topology on the picture appears all the time.
If i apply smooth on the areas shown, i get nice surface but usinc standard or clay on the smoothed area makes the mesh look bad again. Polishing is solving the issue but still, ı can not apply any other brush on this area again.
How can i fix this issue? And what steps should i follow not to get this bad polygons?