Click (Mesh tab > Mesh Diagnostics panel > Zero Area). The Zero Area Elements Diagnostic pane is displayed.
Set a minimum edge length in the input parameters as the tolerance for the diagnostic to identify elements with an area less than the equivalent area.
Set the Options you require in the Zero Area Elements Diagnostic pane.
Show zero area elements in the graphics pane or as text results by selecting from the drop down list.
Use the checkboxes to display the mesh/model, to place the results in a diagnostic layer, and to restrict the display to visible entities only.
Click (Mesh tab > Mesh Diagnostics panel > Show) to toggle the diagnostic display on or off.
Use appropriate tools in the Mesh > Mesh Repair panel to fix the elements. For example, depending on the specific problem, Global Merge, Merge Nodes, Move Nodes, or Remesh Area may help.