 [ Symptoms ] can rapid weight loss actually be causing me to have higher blood pressure  my bicycle is my main transportation i live in az and i ride an avg of 8 miles a day and have lost over 50 lbs in the last 10 wks i have been overweight all my life and always had high blood pressure my blood pressure has been lower than it has been in over 20 yrs until about 2 3 wks ago it is trending back up with no dietary change or decrease in exercise can dehydration or not enough cool down time from physical activity be to blame [ Disease ] the best thing to do is see a registered dietitian who can take your mother is dietary restrictions food preferences and nutritional needs into account while some online services might provide some guidelines it does not replace a health professional with the knowledge and the ability to personalize information go to eatright org to find a registered dietitian in your area good luck