I check my blood pressure regularly with a home monitor, and it varies a lot.  When my doctor takes it, it's different, too.  How do I know what my blood pressure really is?
D000203:Activities of Daily Living; D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods*; D015924:Blood Pressure Monitors; D015438:Health Behavior; D006801:Humans; D006973:Hypertension / Q000175:diagnosis*; D008991:Monitoring, Physiologic; D012648:Self Care / Q000379:methods*