There are three main types of vertigo: spontaneous vertigo, recurrent attacks of vertigo, and positional vertigo.  Out of the three, the most common type of vertigo is the positional vertigo.  This is the disorder where with particular head positions, an abnormal sense of movement is felt. Some head positions include lying on one side or turning your head back. In these positions, one might get the sensation that the room around you is moving, or that you are moving. Positional vertigo is initiated by the position of the head, while in other types of vertigo, initiation is through movement of the head. 

Within the body, there are four types of neurotransmitters of the vestibular system that help to control the effects of vertigo. The first is histamine. Histamine generally counteracts motion sickness. The second, norepinephrine, controls the intensity of reactions to vestibular stimulation. Third, dopamine affects vestibular compensations, and lastly, seratonin works in bringing down nausea.  Many different types of treatment are being used to help treat those with vertigo. Often, vestibular suppressants and antiemetic drugs are given to patients.

Although vertigo is not a fatal disorder, it continues to plague many individuals by giving them symptoms of dizziness along with other unsteady sensations of movement. Ongoing studies are starting to open new paths of treatment, especially with drugs such as antiemetics, calcium channel blockers, and sodium channel blockers. Even though many of these new treatments have yet to be approved, there is definitely an optimistic outlook for these individuals.

Now the big question, have you consulted a physician? 

More often than not positional vertigo does go away after several months or maybe it is people learn to ignore or deal with the feeling.  Either way it doesn't bother you. 

Some people get it when there's high heat or high humidity. I would get it in the Army if I was standing at attention for long periods of time. Then I learned not to lock my knees and the problem went away. Sure does suck if you're standing there and get dizzy.