What does it mean when i feel light headed and have a weird taste in my mouth?

Possible Dehydration: If this is a common feeling, you should seek medical advice from your primary care physician first in order to rule out a major medical issue, or if you are on any medications, a possible side effect. If you check out as healthy, the light headedness could be from being dehydrated and unbalanced diet. You should be drinking plenty of water throughout the day and eating a balanced diet.