Hello, is it a brain tumor if you often have severe headaches and only dizziness and nausea without any neurological deficits?

Some time ago, I finally overcame the fear and went to my family doctor to discuss my foreskin, which wouldn't fully retract. At first, I thought he'd refer me to a specialist, but instead, after a brief examination, he told me this wasn't necessary; the problem was due to the frenulum being too firm. However,…