Dizziness is a general term that can describe a feeling associated with a number of other symptoms including vertigo, light headedness or just a sense of loss of balance. Each of these can be caused by different things.1  Vertigo: Vertigo is feeling a sense of spinning or motion when there is none.izziness is a general term that can describe a feeling associated with a number of other symptoms including vertigo, light headedness or just a sense of loss of balance. Each of these can be caused by different things.
Currently the basic rule is that carry on baggage must be no taller than 22 inches, no wider than 14 inches, and no deeper than 9 inches. In many cases, you'll also have to contend with limits on weight.
Passengers on United Airlinesâ flights are allowed one carry-on bag and one personal item (personal items include purses, backpacks, and briefcases) free of charge. Carry-on luggage must fit in the overhead bins or under the seat in front of you and must not exceed the following maximum dimensions: 45 linear in.