When does a high blood pressure patient need to see cardiologists?

Depends. When the primary care provider cannot control the BP to a reasonable level, when there are difficulties in choosing correct meds, when there is concern of underlying heart disease.

Related Questions

Why is exercise not good for the patients high blood pressure?

It is Good! Exercise has many cardiovascular benefits. A regular exercise program has been shown to be part of a successful weight reduction program, improve cardiovascular function and help reduce hypertension and its ill effects. However, since blood pressure normally rises with exercise those with severe hypertension may need a graduated, supervised and monitored program to start.
It is good. While blood pressure can increase during exercise as the body needs more oxygen delivered to the tissues, regular exercise actually is associated with a decreased risk of hypertension and an improved blood pressure control. One should start an exercise program slowly and build up over time.