I have been having headaches for the past 5 days, what does this mean? is it bad?

Various causes: There are different types of headaches but ones lasting five days should be evaluated by a physician. They may be tension,muscle contraction headaches or be due to sinus congestion,visual problems,or cranial problems. Migraines are not apt to last that long. High blood pressure is a less likely cause. Take TYLENOL (acetaminophen) and see your physician for diagnosis.

Fever?: you may have fever or recent infection. Migraine is a possibility Please see a pediatrician soon

Headache: If this is new onset of a headache I would recommend you get checked. Does it effect your vision, are you light sensitive, is your neck stiff, do you have a fever. all concerning.