My spouse, 49, recently had a sudden onset of hypertension. She is taking no medication. BP has always been in the range of 110/65, was last tested at doctor's office just a few months ago. Has never had hypertension in her life except late in some pregnancies, which went away. She recently took a long driving trip over two days by herself, 1,100 miles and drank a lot of caffeine to stay awake, as she'd had only a few hours of sleep after the first day. When she arrived home her BP was high, ranging from 150/100 up to 170/105. This has persisted for the last 36 hours, standing up, lying down. Worried about her. Could the trip have had something to do with it? Could the stress of it possibly last that long, manifesting itself in temporary hypertension? Or do people suddenly just get HBP all at once?