What to do if i keep having horrid headaches. is it true that bad headaches could mean a brain tumor?

Very uncommon: A headache coupled with confusion, dizziness, memory loss, slurred speech, loss of balance, weakness on one side of the body, seizures or blurred or double vision could signal a stroke or brain tumor, so always demand prompt medical action in those circumstances. Isolated headache is rarely caused by brain tumors.

Possible but unlikel: Most headaches are not caused by brain tumors. If you have atypical headaches or the worst headache of your life, you should see a medical professional.