Can dizzy spells be caused by stress?

There are various reasons why people experience dizzy spells and certainly stress/anxiety are one.  

When we are stressed and anxious we often take shallow breaths or hyperventilate, both of which interfere with the supply of oxygen to the brain and can result in these symptoms.

Other reasons for dizziness may be dehydration, low blood sugar, lack of iron, low blood pressure and standing up too quickly, menopause or even a virus to the inner ear (dizziness often happens when lying down in this instance). 

Dizziness can also be a side effect of certain medications or sometimes relate to underlying health issues.  

Although dizziness is a common symptom and not usually serious, it is important to check with your doctor especially if it is happening on a regular basis and/or is accompanied by any other symptoms.