Occupational Hygiene (Industrial Hygiene) and Occupational Medicine are related fields whose practitioners often work together.Occupation Hygiene involves assessing and controlling stressors and hazardous agents in the workplace. It is practiced by Occupational Hygienists (Industrial Hygienists), Occupational Hygiene Engineers, and Occupational Hygiene Technicians. Occupational Medicine involves assessing the medical status of individuals and providing medical treatment or support as needed. It is practiced by Occupational Physicians, Occupational Health Nurses, and some Physicians' Assistants.Some Occupational Physicians are also qualified Occupational Hygienists.

Yes, there is a a difference between occupational hygiene risks and occupational medicine risks, although there is also substantial overlap.

Occupational hygiene risks are risks in the work environment that might impact the health of a person in that environment.

Occupational medicine risks include many of those, but also include medical or physical conditions that a person might have that could pose a risk to the health of that person if he or she were to spend time in a particular occupational setting.

Bernardino Ramazzini

It is not necessary to capitalize "occupational medicine" in the middle of a sentence unless it is a proper noun or part of a title.

They are two different things a therapist provides all kind of support and help for any group of patients needing assistance , whereas occupational medicine is more into occupational diseases, their prevention and cure.