Invisible Disability:

An invisible disability is a physical, mental, or neurological condition not apparent to others. It can affect daily activities, mobility, or cognitive abilities. Examples: chronic pain, anxiety and depression, neurological disorders (epilepsy, multiple sclerosis), sensory disorders (hearing loss, vision impairment), chronic fatigue syndrome, learning impairment (dyslexia, ADHD) — which vary in severity and impact on daily life.