A blood pressure reading of 157/99 is considered high blood pressure (hypertension) and is potentially dangerous. The systolic reading (157) is significantly above the normal range, as is the diastolic reading (99). This level of blood pressure can increase the risk of heart disease, stroke, kidney disease, and other serious health problems. It's important to consult with a healthcare professional to determine the underlying cause and develop a management plan, which may include lifestyle changes, medication, or both.