Hi welcome to the health care magic Here for headache and dizziness you have ruled out Otological and other referred causes Now your blood pressure has to be checked... RBS and HB estimation also done to rule out hypoglycemia and anemia like condition If specific cause detected than treated accordingly Lack of sleep, irregular meal, stress and excess heat exposure should be avoided Avoid smoking if having habit Alcohol habit and vitamin deficiency also can lead this Take care Consult physician for examination