There can also be physical issues that can be masked psychologically. You can train your brain to ignore and mask many pains and aches and dull them down. IMHO, managing pain can definitely be done psychologically, at least to some extent.

Being too aware of the pains, obsessing over them, and being anxious and stressed definitely aggravate the conditions in my experience. Having an otherwise healthy balanced life in terms of work, relationships etc. with healthy amount of stress, makes some of the ailments very manageable or a non-issue.