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A condition in which the blood doesn't have enough healthy red blood cells. Anaemia results from a lack of red blood cells or dysfunctional red blood cells in the body. This leads to reduced oxygen flow to the body's organs. Symptoms may include fatigue, skin pallor, shortness of breath, light-headedness, dizziness or a fast heartbeat. Treatment depends on the underlying diagnosis. Iron supplements can be used for iron deficiency. Vitamin B supplements may be used for low vitamin levels. Blood transfusions can be used for blood loss. Medication to induce blood formation may be used if the body’s blood production is reduced.

A cancer of the lymphatic system. The lymphatic system is the body's disease-fighting network. It includes the lymph nodes, spleen, thymus gland and bone marrow. The main types of lymphoma are Hodgkin's lymphoma and non-Hodgkin's lymphoma. Symptoms include enlarged lymph nodes, fatigue and weight loss. Treatment may involve chemotherapy, medication, radiation therapy and rarely stem-cell transplant. Requires a medical diagnosis Symptoms include enlarged lymph nodes, fatigue and weight loss. People may experience: Whole body: fatigue, loss of appetite, or night sweats Also common: shortness of breath, swollen lymph nodes, or weight loss

A cancer of plasma cells. The plasma cells are a type of white blood cell in the bone marrow. With this condition, a group of plasma cells becomes cancerous and multiplies. The disease can damage the bones, immune system, kidneys and red blood cell count. Symptoms may not be present or may be non-specific, such as loss of appetite, bone pain and fever. Treatments include medication, chemotherapy, corticosteroids, radiation or a stem-cell transplant.

A blood clot in a deep vein, usually in the legs. This condition is serious because blood clots can loosen and lodge in the lungs. Leg pain or swelling may occur, but there may be no symptoms. Treatments include medication and use of compression stockings.