When Ordinary Childhood Symptoms Become Something More
When our daughter Addie started experiencing recurring high fevers and vomiting, childhood cancer was the furthest thing from my mind.
Like most parents, we searched for explanations that made sense. Was she teething? Was it a stomach bug? A urinary tract infection? Iron deficiency?
Her symptoms would come and go. There were times when she seemed better, and we hoped whatever was making her sick had finally passed. But then the fevers or vomiting would return.
We continued seeking medical care, trying to understand why she kept getting sick. Yet no one could seem to find the answer.
After months of frustrating medical visits, Addie was diagnosed with hepatoblastoma, a rare form of childhood liver cancer, in November 2015. It was just four days before her second birthday. By then, she had a tumor in her liver approximately the size of a grapefruit.
I share this not to frighten parents or suggest that every fever or stomach bug is something serious. Most of the time, these symptoms have far more common explanations.
I share it because I never considered that cancer could be a possibility. Her symptoms didn’t look like what I imagined childhood cancer would look like.
Childhood cancer can be difficult to recognize because many early symptoms overlap with ordinary illnesses. Understanding what to watch for, especially when symptoms persist, recur, or worsen, can help parents know when to ask more questions.
What Are the Early Signs of Cancer in Children?
The early signs of cancer in kids often look like ordinary childhood illnesses. Childhood cancer is rare, and the majority of children experiencing symptoms such as fever, fatigue, bruising, or vomiting do not have cancer. However, the American Cancer Society and the American Academy of Pediatrics identify several signs that deserve medical evaluation when they are unexplained, persistent, worsening, or occurring together. [1, 2]
- Unexplained or recurring fevers
- Unusual bruising or bleeding
- Persistent fatigue or paleness
- Unexplained lumps or swelling
- Ongoing bone, joint, or abdominal pain
- Frequent headaches, particularly with vomiting
- Changes in balance, walking, or vision
- Unexpected weight loss or decreased appetite
- Persistent or recurring vomiting
- Unusual changes in a child’s behavior or activity level
These symptoms are not specific to cancer. They can occur with many other medical conditions. What matters is understanding your child’s normal patterns and recognizing when something has changed.
Unexplained Bruising, Paleness, and Low Energy
Children are active. Bruises are often part of growing up, especially when little ones are learning to walk, run, and explore. But a sudden increase in unexplained bruising, unusual bleeding, or tiny red or purple spots beneath the skin may warrant medical attention.
Persistent paleness, unusual fatigue, frequent infections, and recurring fevers can also be important symptoms to discuss with a pediatrician. Certain childhood cancers, including leukemia, can interfere with the body’s ability to produce healthy blood cells, contributing to these symptoms. One isolated symptom rarely tells the whole story. The combination, persistence, and progression of symptoms often provide more useful information. [1]
Persistent Pain, Lumps, and Abdominal Swelling
Children experience aches and pains for many reasons. But pain that continues without an obvious explanation, a new limp, or a child who suddenly refuses to walk should be evaluated. Unexplained lumps or swelling in the neck, limbs, chest, or abdomen also deserve attention.
Some childhood cancers develop as solid tumors. Depending on where the tumor is located, symptoms may include pain, swelling, decreased appetite, or changes in normal activity. [1]
What Are the Early Signs of Hepatoblastoma?
Hepatoblastoma is the most common type of liver cancer in young children, typically affecting children younger than three years old. Our guide to hepatoblastoma treatment, relapse, and research explains what happens after a diagnosis. According to the National Cancer Institute, possible symptoms include abdominal swelling or a lump, abdominal pain, unexplained weight loss, loss of appetite, and nausea or vomiting. Other pediatric medical sources also identify fever and fatigue as possible symptoms. [3, 4]
One challenge with hepatoblastoma is that children may not develop obvious symptoms until the tumor has grown larger. In Addie’s case, recurring high fevers and vomiting were among the symptoms that led us to seek repeated medical attention.
I didn’t recognize those symptoms as possible signs of liver cancer. I was thinking about the illnesses that are so much more common in young children. And even today, knowing what I know, I recognize how difficult it can be to distinguish ordinary childhood sickness from something more serious.
Headaches, Vomiting, and Changes in Movement
Headaches and vomiting are common childhood complaints, but certain patterns deserve closer evaluation. Recurring headaches, particularly those accompanied by vomiting, changes in vision, unusual sleepiness, or problems with balance, should be discussed with a healthcare professional. Other neurological warning signs may include seizures, difficulty walking, changes in speech, or unusual movements. These symptoms can have many causes unrelated to cancer. However, new or worsening neurological symptoms should never be dismissed without appropriate medical assessment. [1]
When Should Parents Seek Medical Advice?
One of the most important lessons from our experience with Addie is that symptoms don’t always follow a predictable pattern. Sometimes a child gets sick, improves, and then becomes sick again. That temporary improvement can be reassuring. It can also make it harder to recognize that something ongoing needs further investigation.
The American Cancer Society recommends having a child evaluated when unexplained symptoms do not improve or go away. There is no single waiting period that applies to every symptom or every child. The appropriate response depends on the child’s condition, the severity of the symptoms, and how they are changing. [1]
Contact your child’s healthcare professional when symptoms are unexplained, recurring, worsening, or affecting everyday activities. Seek urgent medical attention for serious symptoms, and emergency care for severe difficulty breathing, unresponsiveness, uncontrolled bleeding, or other life-threatening conditions.
If symptoms continue after an initial appointment, ask what the next steps should be. And if you remain concerned, it is reasonable to ask for further evaluation or another medical opinion.
Common Childhood Illnesses Versus Concerning Patterns
Most children experience fevers, stomach bugs, fatigue, and occasional unexplained aches during childhood. These symptoms alone usually do not indicate cancer. What can be more concerning is a pattern that doesn’t fit the expected course of an ordinary illness.
For example, a child may seem to recover but repeatedly become ill again. A symptom may continue longer than expected, or new symptoms may appear without a clear explanation. Looking back at Addie’s experience, this is what stands out to me.
Her symptoms would come and go. We had reasonable explanations for what might be happening, and we were working with medical professionals to find answers. Cancer wasn’t on our radar. I don’t share that because I believe we should have known. I share it because I want other parents to understand that you don’t have to know what’s wrong to keep asking questions.
You don’t need a diagnosis to advocate for your child.
Signs of Cancer in Infants and Toddlers
Identifying concerning symptoms in babies and toddlers can be especially challenging because young children cannot always explain how they feel. Parents and caregivers often rely on changes in behavior, appetite, sleep, movement, and physical appearance.
Some symptoms that deserve medical evaluation include persistent abdominal swelling, unexplained feeding difficulties, poor weight gain, unusual fatigue, or loss of previously acquired developmental abilities. A white reflection in the pupil, sometimes noticed in photographs, or newly misaligned eyes should also receive prompt medical assessment because these can be signs of serious eye conditions, including retinoblastoma. [2]
Again, these changes do not automatically indicate cancer. They are reasons to seek professional guidance rather than attempting to identify the cause at home.
How to Advocate for Your Child During Medical Appointments
Parents know their children in ways that no one else can. You know their energy, personality, habits, and what is normal for them. That knowledge matters. When your child is experiencing unexplained or recurring symptoms, it can be helpful to keep a simple record of:
Timing: When did the symptoms begin? How frequently do they occur?
Patterns: Do symptoms come and go? Are they becoming more frequent or severe?
Daily changes: Is your child eating, sleeping, playing, or behaving differently?
Additional symptoms: Have new symptoms appeared?
Previous evaluations: What tests, treatments, or explanations have already been discussed?
Bring these observations to appointments and ask questions when something doesn’t make sense. If your child continues to experience symptoms despite treatment or reassurance, ask what else might explain them and whether additional evaluation is appropriate.
Before leaving an appointment, ask what changes should prompt another call and when follow-up should occur. Medical professionals bring essential expertise. Parents bring an equally important perspective: a close understanding of their child’s everyday life. Good medical care benefits from both.
Trust Your Instincts, Ask Questions, and Keep Advocating
If there’s one thing I hope parents take away from this article, it’s this: Pay attention to persistent changes. Trust your instincts enough to ask questions. And if something still doesn’t seem right, don’t be afraid to keep searching for answers.
That doesn’t mean assuming the worst every time your child gets sick. It means recognizing that you are an important part of your child’s healthcare team. Ask questions when you don’t understand. Request clarification when an explanation doesn’t seem to fit. Seek another medical opinion when concerns remain unresolved.
You don’t have to be confrontational to be a strong advocate. You can be respectful, collaborative, and persistent at the same time.
I wish I had understood more about the signs of childhood cancer before Addie was diagnosed. Not because I believe that knowledge would necessarily have changed her outcome, but because I never imagined something so serious could be behind symptoms that seemed so ordinary. I hope sharing our experience gives other parents information I didn’t have.
Why Childhood Cancer Awareness and Research Matter
Addie’s story didn’t end when she died. Her life continues to shape the work we do through the Foundation for Addie’s Research. You can read more in Addie’s story.
After losing Addie to hepatoblastoma, our family became determined to help advance research and create more treatment possibilities for children facing this rare disease. Through our foundation, we support pediatric liver cancer research and help connect families with trusted information and resources through the Hepatoblastoma Resource Network.
Awareness and research serve different but important purposes. Awareness helps families recognize concerning symptoms, ask informed questions, and seek appropriate medical care. Research helps scientists better understand childhood cancers and develop the treatments children urgently need. Both matter.
We cannot promise that recognizing symptoms will change every outcome. And we cannot promise that every research project will lead to a breakthrough. But we can continue learning, advocating, supporting families, and investing in the possibility of better treatments. That’s how we choose to carry Addie’s legacy forward.
If sharing her story encourages even one parent to ask another question or helps one family feel more informed and supported, then it’s worth sharing. And if it inspires someone to support childhood cancer research, that support can help move important scientific work forward. Give hope today.
Because every child deserves the chance for more tomorrows.
To learn more, read Addie’s story, explore our hepatoblastoma research, and see how we support families facing childhood cancer.
Frequently Asked Questions About Childhood Cancer Symptoms
What are the signs of cancer in kids?
Possible signs include unexplained fevers, unusual bruising, persistent fatigue, lumps or swelling, ongoing pain, unexplained weight loss, and headaches accompanied by vomiting. These symptoms usually have causes other than cancer, but persistent or worsening changes deserve medical evaluation. [1, 2]
Can childhood cancer symptoms come and go?
Some symptoms may fluctuate, depending on the disease and other factors. Temporary improvement does not always explain an ongoing problem. If symptoms repeatedly return without a clear explanation, discuss the pattern with your child’s healthcare professional.
Can recurring fevers and vomiting be signs of childhood cancer?
Yes, recurring fevers and vomiting can occur with certain childhood cancers, including hepatoblastoma. However, these symptoms are much more commonly caused by infections and other childhood illnesses. A clinician should evaluate unexplained, persistent, or recurring symptoms. [3, 4]
What are the symptoms of hepatoblastoma in toddlers?
Possible symptoms include abdominal swelling or a lump, abdominal pain, loss of appetite, unexplained weight loss, nausea, and vomiting. Some children may also experience fever or fatigue. A healthcare professional must evaluate symptoms and determine whether testing is needed. [3, 4]
When should I seek a second opinion about my child’s symptoms?
If symptoms continue, worsen, recur, or remain unexplained despite an initial evaluation, consider discussing additional testing or seeking another medical opinion. Ask your child’s healthcare team for a clear follow-up plan.
Medical disclaimer: This article is intended for education and awareness. It does not provide a diagnosis or replace individualized medical advice. If you are concerned about your child’s health, contact a qualified healthcare professional.
Medical References
[1] American Cancer Society. Finding and Diagnosing Cancer in Children. https://www.cancer.org/cancer/childhood-cancer/signs-symptoms-diagnosis.html
[2] American Academy of Pediatrics. Symptoms of Childhood & Adolescent Cancers. https://www.healthychildren.org/English/health-issues/conditions/cancer/Pages/Symptoms-of-Childhood-Cancers.aspx
[3] National Cancer Institute. Hepatoblastoma. https://www.cancer.gov/types/liver/childhood-liver-cancer/hepatoblastoma
[4] Cincinnati Children’s Hospital Medical Center. Hepatoblastoma. https://www.cincinnatichildrens.org/health/h/hepatoblastoma
[5] Foundation for Addie’s Research. Addie’s Story. https://addiesresearch.org/story/
