When I was in my 20's I also had high blood pressure which they thought was caused by taking the pill. I went off of it and my pressure never lowered. I have been on medication for over 20 years now and high blood pressure is nothing to mess around with. She should get on medication for it right away if the doctors think she should. Being overweight, caffeine, stress, eating salt, smoking, and the list goes on what can cause it. Taking care of her own health now should come before considering having children.