I don't have high blood pressure, but I've had the most stressful year of my life and my T has gone completely berserk. Blood pressure and T are also often linked together, so I'm going to say yes both can cause fleeting T.
@jerryjerry I have had blood pressure for many years but it is controlled with medication and haven't had any problems with my tinnitus. However, stress does make it more intrusive.
Michael