Why is moving a vertex messing up my mesh? I am doing a lesson from the Blender Guru (Making a donut).
When I move a part of the icing, my mesh gets totally messed up.

The icing had a bit of sculpting. I made it a bit thicker.
Would it be better to move the vertex in position and than do the sculpting?
When I did the tutorial I had the same problem. I think I solved it by rotating it along one axis.
See if that makes a difference.