Does childhood cancer cause easy bruising?

Childhood cancer can affect blood cells or the bone marrow, which may alter the body's ability to stop bleeding. Bruising may appear alongside unusual tiredness, pale skin, repeated infections, fever, nosebleeds or bleeding gums. These features can also occur with infections, medicines, clotting conditions, nutritional problems or ordinary knocks during play. The pattern, location and timing of bruises matter, so a clinician may ask about injuries, family history and other symptoms and examine the child.

Record when bruises appeared, where they are, whether the child recalls an injury and whether they are increasing. Do not stop a prescribed medicine without advice. Arrange a prompt medical assessment for unexplained, repeated or unusually large bruises, especially when there is bleeding or a change in the child's energy, appetite or behaviour. A clinician can decide whether examination or blood tests are appropriate.

Seek urgent care for bleeding that does not stop with firm pressure, blood in vomit, urine or stool, severe weakness, confusion, trouble breathing, a severe headache or a rapidly worsening illness. Emergency assessment is also appropriate when bruising is accompanied by a high fever and the child looks seriously unwell. Easy bruising should be assessed according to the child's overall condition, not treated as a diagnosis by itself.

Ask what features make the bruising concerning, whether any medicines or activities should be paused, which tests may help explain it, and how quickly the child should be reassessed.