Palatal major connectors should be relieved over a palatal torus to prevent excessive pressure and trauma to the underlying bony prominence. The torus is a non-resilient, firm bony growth that can cause pain and ulceration if the rigid metal of the connector rests directly on it. Relief allows for a uniform distribution of stress to surrounding soft tissue, enhancing patient comfort and prosthesis stability. Other palatal areas like the median palatine raphe are fibrous and can tolerate minor pressure without relief. Therefore, careful relief over the palatal torus is essential to avoid mucosal injury and improve denture tolerance.

Reference: McCracken's Removable Partial Prosthodontics, Jacob S. C., 13th Edition.