Hypermagnesemia is a medical condition characterized by an abnormally high level of magnesium in the blood. This can occur due to various factors, including excessive intake of magnesium supplements, kidney dysfunction, or certain medications. Symptoms may include nausea, vomiting, muscle weakness, and low blood pressure. Diagnosis typically involves blood tests to measure magnesium levels. Treatment focuses on addressing the underlying cause, which may involve reducing magnesium intake or improving kidney function. In severe cases, medical interventions such as intravenous fluids or medications may be necessary to lower magnesium levels safely.