 [ Symptoms ] my 14 year old had had a severe headache and sore throat for a week she just finished antibiotics what to do [ Disease ] sugar intake should not cause blood pressure to increase but foods high in sodium can many convenience foods have sugar salt and fat so it could be that the days you eat sugar you also get extra sodium causing your blood pressure to spike if you want to avoid diabetes keep your weight in check eat a healthy diet and get plenty of exercise this webmd article provides more of the specifics on preventing diabetes from developing