If you are fainting in a dream, then such dream, then such dream indicates some situation in your life, which you are unable to solve. The dream could also indicate the lost balance and harmony in your life. Make sure you are aware of that. If you see someone else that faints, then such dream indicates some stage of this persons life, which will have to be changed by you. You will be the helper.
Read more about dreaming of Fainting in other dream meanings interpretations.