Historically, the difference in treatments a medical versus non-medical aesthetician was able to offer was significant. Nowadays, not so much.
Medical aesthetician
These aestheticians are already doctors or nurses who have medical qualifications and academic training. They have broader and deeper knowledge of skin, as well as the body, muscles and nerves.
As a result, medical aestheticians can deal with more complex skin issues, trauma and plastic surgery.
Non–medical aesthetician
Practitioners studying a Level 4 aesthetics course learn about anatomy and physiology to ensure they have thorough knowledge of the human body. However, this not to the same depth or level as the medical aesthetician.