Symptoms and Warning Signs of Acute Lymphoblastic Leukaemia ALL progresses rapidly, and symptoms usually appear suddenly over days or weeks. They reflect the disruption of normal blood cell production in the bone marrow. Common Symptoms In children, these symptoms may be mistaken for common illnesses like flu or growing pains, delaying diagnosis. In South African clinics, where resources are stretched, simple blood tests such as a full blood count (FBC) can provide the first clue. Emergency Symptoms Any combination of persistent fatigue, infections, and bruising in a child or adult should prompt urgent medical attention. 🔹 Next → [Diagnosis and Treatment of ALL] The “Should I Be Worried?” Feeling: Depression Warning Signs Acute Lymphoblastic Leukaemia Complications and Recovery Outlook of Acute Lymphoblastic Leukaemia Causes and Risk Factors of Acute Lymphoblastic Leukaemia