Can someone give me a fix or what to avoid so that this doesnt happen?
I cant tell what’s happening just from the picture. Could I get a blend file?
If the edge formation is not in grid form, a similar problem arises.
See if there’s anything wrong with edge formation 
is this entirely one mesh or is there more than just one?
You should check if all meshes with holes in them have quad topology ( Quads work well when subdividing holes )
Here’s a bad example, The mesh has an alright quad topology, so making sure the full mesh is made of quads can solve your issue
More information may make your problem clearer.