My 17 year old daughter has recently had several episodes where she's had blurry vision and feels faint. One time she even passed out. These episodes can occur anywhere, and she has even been sitting down when these happen. After one of these "spells" she doesn't feel well and feels very shaky, tired and weak. Any ideas. Thanks!
The most common cause of fainting is low blood pressure. I suggest you check your daughter's blood pressure over the course of the day. Shakiness, tireness and weakness are all symptoms of anemia. Take her to a doctor to get checked out.