Use the Mesh Cleaner modifier to identify and repair degenerate mesh data that exists on your polygon or triangle mesh object. Degenerate mesh data can lead to problems ranging from geometry manipulations that do not apply or give an expected result, or in more extreme cases can cause instability.
Modify panel > Make a selection > Modifier List > Object-Space Modifiers > Mesh CleanerDegenerate edges and face contain two vertex indices that are identical. Faces therefore have no geometric area, and no normal. Degenerate edges include a zero-linked edge.

Click to detect problems in your target mesh.
Number of degenerate edges detected.
Number of degenerate faces detected.
When enabled, attempts to detect any UV coordinates as part of UV spaces that are too small compared to the size of the mesh volume. When repaired, the detected UV coordinates are detached from those unaffected to scale up the UV area.
When enabled, attempts to detect any non-manifold sections that prevent a watertight mesh.
When enabled, attempts to detect any non-planar faces through triangulation. When repaired, the detected non-planar faces have their UVs shifted to make them planar.
When enabled, attempts to detect any exploded points or isolated vertices that do not hold any mesh data. When repaired, the isolated vertices are deleted.
Click to repair all selected mesh problems.
ESC key on Mesh Cleaner modifier operation in case cleanup takes too long.