Red rash just above your ankles only happens when you retain water and blood pressure is up?

Red rash just above your ankles that only occurs when you retain water and your blood pressure is high could be a sign of dependent rubor. Dependent rubor is a skin condition that causes redness and swelling in the lower legs and feet. It is caused by the pooling of blood in the legs and feet when a person is standing or sitting for long periods of time. Dependent rubor is not usually a cause for concern, but it can be a sign of an underlying medical condition, such as heart failure, kidney disease, or liver disease. If you are experiencing dependent rubor, it is important to see a doctor to rule out any underlying medical conditions.