Pancytopenia is a condition that occurs when a person has low counts for all three types of blood cells: red blood cells, white blood cells, and platelets.Pancytopenia is usually due to a problem with the bone marrow that produces the blood cells. However, there can be several different underlying causes.The condition is not a disease, but a description of the laboratory findings of low blood cells.In the most extreme cases of pancytopenia, a person can have infections, the signs of severe anemia, including fatigue and difficulty breathing, and bleeding.It is necessary to understand what each of the three different types of blood cells do to recognize pancytopenia’s symptoms.For example, red blood cells carry oxygen. Therefore, if a person does not have enough red blood cells due to pancytopenia, they may have difficulty breathing and feel fatigued.Platelets are responsible for helping blood to clot, during wound healing. If a person’s platelets are low, they may bleed more easily.White blood cells help to fight infection. Therefore, if a person has a low white blood cell count, they may be more prone to infection.