Childhood Leukemia Symptoms: Early Signs Parents Should Know image

Childhood Leukemia Symptoms: Early Signs Parents Should Know

Posted on: Aug 17, 2026

Leukemia, a type of blood cancer, is the most common childhood cancer. The early signs and symptoms can be the same as many common illnesses. It is important for parents and caregivers to know what to look for. This can help you recognize changes that may need further evaluation.

Changes in physical activity

Children with leukemia may experience changes in their usual level of physical activity. They may: 

  • Feel tired

  • Have less energy for playing or sports

  • Want to rest more often than usual

  • Avoid certain activities because of bone or joint pain, weakness, or generally not feeling well

A noticeable and ongoing change in how active a child normally is can be one of several signs to discuss with a healthcare provider.

Unusual bleeding and bruising

Children with leukemia may bruise easily. Parents may also notice frequent nosebleeds or bleeding gums. Cuts may take longer than usual to stop bleeding. It can also cause small red or purple spots under the skin called petechiae. These symptoms can occur when leukemia affects the body’s ability to make enough healthy platelets, which help the blood clot.

Infections

Leukemia can affect the body’s immune system. This can lead to infections. 

Children with leukemia may develop:

  • Fevers

  • Infections that keep coming back

  • Illnesses that last longer than expected

Other common signs and symptoms

Other signs and symptoms of childhood leukemia can include: 

  • Anemia (too few red blood cells)

  • Bone or joint pain

  • Abdominal (belly) swelling or pain

  • Swollen lymph nodes

  • Difficulty breathing 

It is important to remember that these symptoms have many causes that are not cancer. Having one or more does not necessarily mean a child has leukemia. But it is important to tell your child’s doctor if you notice these changes. 

Early evaluation can make a difference

Many of the early signs of leukemia can look like symptoms of common illnesses or everyday health issues. Because these symptoms are common, leukemia can be difficult to recognize early. 

If symptoms get worse or do not go away, it’s important to talk with a healthcare provider. They will determine if  further evaluation, such as a blood test, is needed. Seeking medical evaluation early can help ensure your child receives the care they need as soon as possible and lead to better overall outcomes. 

Questions to ask your doctor 

Your child’s healthcare team can help you better understand the diagnosis and treatment plan.

Some questions to ask your team include: 

  • What type of leukemia does my child have?

  • What treatment do you recommend and why?

  • What side effects should we expect?

  • How will we know if the treatment is working?

  • Are there any clinical trials or additional treatment options that may be appropriate for my child?

There are many resources designed to help families affected by childhood cancer. Mental health professionals, peer support groups, and survivorship organizations can also offer guidance on topics like relationships, fertility, employment, insurance, and emotional health. Connecting with others who share similar experiences can help adult survivors find practical advice, build community, and navigate life after childhood cancer with confidence. Follow the links below for helpful resources.

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When you join HealthTree, you will have the opportunity to hear from others and participate in real-world data studies through short surveys that can improve outcomes for the entire community. 

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Sources:

Healthtree contact Bethany Howell

Bethany Howell

Bethany joined HealthTree in 2025. She is passionate about supporting patients and their care partners and improving access to quality care.