I think theoretically, some adults can learn and study what they need to know,perhaps observe treatment and then possibly self treat. There are no prescription drugs that require a physician and lots of information is available. That said, I think an OT is the best source of help and guidance for most people. Reading as much as possible and learning what works goes easier when you have an expert to help guide you. Not all adults have the ability to self treat, so I think it's the person.