An invisible illness includes a physical, mental, or neurological condition that is not visible from the outside. These cause limitations or challenges in one’s movements, senses and activities. People with rare, chronic diseases often spend years searching for a diagnosis. These diseases fall under the inclusive term “Invisible Illnesses,” and people living with them are repeatedly dismissed, turned away, or not believed because they look “normal.” Thousands of illnesses and disorders can be debilitating and potentially included under this umbrella.