<unk>  is an imprecise term that can refer to a sense of disorientation in space, vertigo, or lightheadedness. It can also refer to disequilibrium or a non-specific feeling, such as giddiness or foolishness.<unk>  is a common medical complaint, affecting 20-30% of persons.<unk>  is broken down into 4 main subtypes: vertigo (~25-50%), disequilibrium (less than ~15%), presyncope (less than ~15%), and nonspecific<unk>  (~10%). * Vertigo is the sensation of spinning or having one's surroundings spin about them. Many people find vertigo very disturbing and often report associated nausea and vomiting. * Presyncope describes lightheadedness or feeling faint; the name relates to syncope, which is actually fainting. * Disequilibrium is the sensation of being off balance and is most often characterized by frequent falls in a specific direction. This condition is not often associated with nausea or vomiting. * Non-specific<unk>  may be psychiatric in origin. It is a diagnosis of exclusion and can sometimes be brought about by hyperventilation.
Dizziness
Vertigo
Diplopia
Cyclopia
Tinnitus
Headache
Osmophobia
Photophobia