A blood pressure below 90/60 is considered low in emergency conditions which cause blood loss or dehydration in a individual who normally has higher blood pressure. However at other times in otherwise normal individuals there is no definite set criteria for a low blood pressure. Even a blood pressure of 70/40 may be considered normal for some individuals who always have this readng. Genarally young females have commonly low readings usually below 100 and is considered normal.
Being overweight and having high blood pressure at same time is considered a risk factor for heart disease. However being overweight does not necessarily mean that a person is likely to have high blood pressure. Your blood pressure is in the normal reference range.
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