Tourette Syndrome: Characterized by the presence of both vocal and motor tics, Tourette Syndrome is the most common and well-known tic disorder. It typically starts in childhood and can be associated with other conditions such as ADHD and OCD.

Chronic Motor or Vocal Tic Disorder: These disorders are similar to Tourette Syndrome but are characterized by either only motor or only vocal tics, respectively. They are less severe than Tourette Syndrome but share similar characteristics.
Transient Tic Disorder: A condition where tics last for less than 12 months, often seen in children. It's a common and usually benign condition.
Habit Tics: Also known as habit spasms, these are repetitive movements that are not necessarily involuntary, such as nail biting or hair twirling. They can be differentiated from other tic disorders by their voluntary nature and the absence of the premonitory urge seen in other tic disorders.

Neuroacanthocytosis: A group of rare genetic disorders characterized by abnormal red blood cells and neurological symptoms, including tics. Missing this diagnosis could lead to delayed treatment of a potentially severe condition.
Huntington's Disease: An inherited disorder that causes progressive damage to the brain, leading to cognitive, motor, and psychiatric symptoms, including tics. Early diagnosis is crucial for genetic counseling and management.
Sydenham's Chorea: A neurological disorder occurring in some cases of rheumatic fever, characterized by rapid, involuntary movements (chorea) that can be mistaken for tics. It's essential to diagnose and treat the underlying rheumatic fever to prevent cardiac complications.
Wilson's Disease: A genetic disorder that leads to copper accumulation in the body, causing neurological symptoms, including tremors and tics. Early diagnosis is critical for preventing irreversible brain damage.

PANDAS (Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections): A condition where a streptococcal infection triggers autoimmune antibodies that affect the brain, leading to sudden onset of OCD, tics, and other symptoms. It's rare but important to consider in cases of acute onset.
Tic Disorders Associated with Other Medical Conditions: Certain conditions like stroke, encephalitis, or drug-induced states can cause tics. These are rare but should be considered, especially in adults with new-onset tics or in the context of other significant medical illnesses.