Some things will always be subjective. Emotions are felt differently by different people, although there is some common ground of course. Likewise, anything that is happening in the subconscious and unconscious mind will be subjective as well.

However, there are very effective ways of working with these aspects that can be done along with medical treatment.

Examples are EFT (tapping), Havening, hypnosis, NLP etc, which are all being increasingly understood and tested. These could save health authorities a lot of money as they can be quick and effective.