It's common to sometimes feel dizzy, lightheaded or off-balance, and it's not usually serious. See a GP if you're worried.
Dizziness includes feeling:
Dizziness usually goes away on its own. But there are things you can do to take care of yourself while you're feeling dizzy.
lie down until dizziness passes, then get up slowly
move slowly and carefully
get plenty of rest
drink plenty of fluids, especially water
avoid coffee, cigarettes, alcohol and drugs
do not bend down suddenly
do not get up suddenly after sitting or lying down
do not do anything that could be dangerous while you're dizzy, like driving, climbing a ladder or using heavy machinery
do not lie totally flat if you feel like things are spinning
do not use pillows to prop up your head
If you have other symptoms, this might give you an idea of the cause. Don't self-diagnose – see a GP if you're worried.