What reading on blood pressure do dr tend to worry more about systolic or diastolic i know both are important?

Diastolic: The bottom number, or diastolic, is more often concerning if over 90, however, if both numbers are elevated or if you have symptoms, such as headaches, vision problems, shortness of breath, chest pain or swelling along with elevated BP, it is concerning and requires evaluation by a Dr and likely medications and checking bloodworm, urine and sometimes an EKG for completeness.

Depends on age: High systolic readings are more dangerous for brain, heart, kidney, circulatory problems, and for death in middle age and older people. High diastolic readings are more associated with heart attack and stroke in the young.