Paroxysmal Nocturnal Hemoglobinuria

PNH, or paroxysmal nocturnal hemoglobinuria, is a rare blood disorder in which the red blood cells are destroyed prematurely due to an acquired alteration in the cells that produce them.

Common symptoms: Fatigue, dark-colored urine especially in the morning, paleness and, in some cases, episodes of abdominal pain.

Why it happens: It is due to a change in the bone marrow cells that makes the red blood cells fragile.

Which specialist treats it? The hematologist is the one who studies and follows up on this blood disease. When there is unexplained dark urine and persistent fatigue, the advisable thing is to seek a detailed evaluation.