What should i be concern about if i am constantly tired and have a headache and dizziness everyday and i can not concentrate? i am 17 year old girl and i have seen my grades dropping because i find myself tired throughout the day and not able to pay atten

These : These symptoms must be evaluated by your doctor. You may be dealing with anemia, thyroid problem, or even something as simple as a visual defect (you may need glasses), amongst many other issues. Are you taking any prescription or other drugs? If so this may be a cause for your symptoms. Please have your parent or guardian schedule a visit with your primary care provider for a check up and appropriate tesing. Good luck to you.

See your doctor: There are a lot of reasons for this. Migraine related dizziness can account for a lot of this problem but there could be other issues such as with your thyroid or low blood counts or vision or maybe you could also have depression. I would recommend you seek help to start feeling better.