Dizziness is a disability in spatial perception and stability. The term dizziness is not specific: it can mean vertigo, presyncope, disequilibrium, or a non-specific feeling such as being drunk or funny.
Dizziness is a common medical complaint, affecting 20-30% of persons.
Dizziness is broken down into 4 main subtypes: vertigo (~25-50%), disequilibrium (less than ~15%), presyncope (less than ~15%) and nonspecific dizziness (~10%).