To fix hidden edge loops in 3D models, use wireframe mode to reveal obscured edges, then adjust or remove redundant ones with selection and editing tools.
Wireframe view shows all edge loops clearly—select hidden edges via loop select, then delete duplicates, move them to visible areas, or merge overlapping vertices to resolve clipping or geometry issues.
If edges hide after subdivision, adjust subdivision levels or add edge creases to keep key edges visible without extra loops.