Invisible disabilities is an umbrella term that covers a range of hidden disabilities or challenges.
An invisible disability is a condition that is not readily visible to the eye but does affect the individuals' ability to learn, interact with others, be a contributing member of society and otherwise participate fully in life. Behavioural and emotional difficulties often follow and may become the focus of attention. For instance, a child may have both Learning Disabilities and Tourette Syndrome. Or an adult may have ADHD and Neurofibromyalgia. Learning Disabilities and ADHD are often co-morbid but they are not the same.