Marwar Hospital, Bikaner

Childhood is a time of growth, learning, playing and exploring the world. Parents naturally pay attention to their child’s health, but some symptoms can be difficult to understand because they may initially look like common childhood illnesses. Fever, tiredness, headaches, loss of appetite, body pain or swollen glands are often caused by infections or other non-serious conditions. However, when certain symptoms are persistent, unusual, severe, or occur in combination with one another, they should not be ignored.

Childhood cancer is uncommon, but early recognition of warning signs can help children receive appropriate medical evaluation without unnecessary delay. According to the World Health Organization (WHO), childhood cancer can occur in children and adolescents, and early diagnosis is an important part of improving outcomes.

This does not mean that every child with these symptoms has cancer. Most of these symptoms have other, more common explanations. The purpose of knowing the warning signs is to help parents understand when a medical evaluation may be appropriate.

What Is Childhood Cancer?

Childhood cancer refers to cancers that develop during childhood. Unlike many cancers in adults, childhood cancers are generally not strongly associated with lifestyle factors. The exact cause is often unknown, although genetic factors and certain other conditions can contribute in a small proportion of cases.

Some of the more common childhood cancers include:

• Leukemia
• Brain and central nervous system tumours
• Lymphoma
• Neuroblastoma
• Wilms tumour
• Retinoblastoma
• Bone and soft-tissue cancers

The symptoms can vary considerably depending on the type of cancer and the part of the body involved.

Because childhood cancers can develop in different organs and tissues, there is no single symptom that identifies cancer. Instead, parents should pay attention to persistent or unexplained changes in their child’s health.

1. Persistent or Unexplained Fever

Fever is extremely common in children and is usually related to infections. However, repeated or persistent fever without an obvious explanation deserves medical attention, particularly when it is accompanied by other unusual symptoms.

Parents should take note if a child experiences:

• Recurrent fever without a clear cause
• Fever that continues or keeps returning
• Fever accompanied by unusual tiredness
• Fever along with weight loss, bruising or bone pain

WHO identifies unexplained fever among the symptoms that may be associated with childhood cancer.

A persistent fever does not automatically indicate cancer. A doctor may need to evaluate the child to determine whether an infection, inflammatory condition or another problem is responsible.

2. Unusual Tiredness or Pale Skin

Children naturally become tired after school, sports or playing. But persistent fatigue that seems unusual for the child should be observed carefully.

A child may appear:

• Less active than usual
• Frequently tired
• Weak or lacking energy
• Pale compared with their normal appearance
• Less interested in playing

These symptoms can occur for many reasons, including nutritional deficiencies, infections and other medical conditions. In some childhood cancers, particularly leukemia, changes in blood-cell production can contribute to fatigue and paleness.

If tiredness persists or is associated with other warning signs, parents should discuss it with a pediatrician.

3. Easy Bruising or Unusual Bleeding

Occasional bruises are normal, especially in active children. However, parents should pay attention to bruising or bleeding that appears without an obvious injury.

Possible warning signs include:

• Frequent unexplained bruises
• Tiny red or purple spots on the skin
• Frequent nosebleeds
• Bleeding gums
• Bleeding that takes longer than expected to stop

These signs can have several causes. However, unusual bruising or bleeding can occur when blood-cell production is affected, which is why persistent or unexplained symptoms should be medically assessed.

4. Persistent Bone or Joint Pain

Growing children may occasionally complain of leg or joint pain. Injuries and normal physical activity are common causes.

Concern may arise when pain:

• Continues for an extended period
• Keeps returning
• Occurs without a known injury
• Interferes with walking, playing or sleeping
• Is accompanied by swelling or a noticeable lump

Bone pain is among the warning symptoms described by WHO in relation to childhood cancer.

Persistent pain should be evaluated rather than assuming it is simply “growing pain.”

5. Unexplained Weight Loss or Loss of Appetite

Children grow at different rates, and appetite can change from day to day. However, unexplained weight loss or a sustained reduction in appetite deserves attention.

Parents may notice:

• Clothes becoming loose
• Reduced interest in food
• A noticeable change in eating habits
• Weight loss without a clear reason
• Reduced energy along with poor appetite

Unexplained weight loss is one of the general warning symptoms associated with cancer, although it is much more commonly caused by other illnesses or circumstances.

If a child is consistently losing weight without an obvious explanation, a pediatric evaluation can help identify the cause.

6. A New Lump or Swelling

A lump or swelling anywhere on the body should be observed carefully, especially if it persists or increases in size.

Parents may notice swelling in areas such as:

• Neck
• Armpit
• Abdomen
• Groin
• Chest
• Limbs

Swollen lymph nodes are frequently caused by infections and are often temporary. However, a persistent or unusual lump should be examined by a healthcare professional.

Some childhood cancers, including lymphomas and certain solid tumours, can present with a mass or swelling.

7. Abdominal Swelling or a Persistent Abdominal Lump

A child’s abdomen may sometimes appear swollen because of constipation, digestive problems or other common conditions. But persistent abdominal enlargement or a noticeable lump should not be ignored.

Possible associated symptoms may include:

• Abdominal pain
• Reduced appetite
• Weight loss
• Fatigue
• A feeling of fullness
• Blood in the urine in some cases

Certain childhood tumours, including Wilms tumour and neuroblastoma, can involve the abdomen.

Parents should not repeatedly press or massage a suspected abdominal lump. Instead, seek medical evaluation.

8. Persistent Headaches With Vomiting

Headaches are common in children and are often related to infections, dehydration, vision problems, migraine or other causes.

However, persistent or progressively worsening headaches—especially when associated with vomiting, neurological changes or other unusual symptoms—should be assessed.

Pay attention to:

• Headaches that repeatedly occur or worsen
• Severe or unusual headaches
• Vomiting, particularly when it repeatedly accompanies headaches
• Changes in vision
• Problems with balance or coordination
• Seizures
• Changes in behaviour or school performance

Brain and central nervous system tumours can produce neurological symptoms such as headaches, nausea, vomiting, seizures and visual or motor changes.

These symptoms are far more often caused by conditions other than brain cancer, but persistent or concerning symptoms warrant medical assessment.

9. Changes in Vision or the Appearance of the Eye

Parents may sometimes notice an unusual appearance in a child’s eye before the child complains of a problem.

Warning signs can include:

• A white reflection in the pupil
• A new squint
• Changes in vision
• Persistent eye swelling
• An unusual appearance of one eye
• Eye pain in some circumstances

A white pupil, known medically as leukocoria, can be an important sign of eye disease and is associated with retinoblastoma among other possible conditions.

Any unusual change in a child’s eye should be examined promptly by an appropriate healthcare professional.

10. Persistent Cough or Difficulty Breathing

Children frequently develop coughs because of viral infections and allergies. But a cough that persists or breathing difficulty without an obvious explanation should be evaluated.

Parents should seek medical advice if a child has:

• A persistent cough
• Unexplained shortness of breath
• Difficulty breathing
• Chest discomfort
• Breathing problems associated with swelling or other unusual symptoms

Some childhood cancers, including certain lymphomas, can cause symptoms related to structures in the chest.

Breathing difficulty itself can be an emergency, regardless of the underlying cause. A child who is struggling to breathe needs immediate medical attention.

11. Changes in Behaviour or Development

Parents know their child’s normal behaviour better than anyone. Sometimes an important change may be noticed through everyday activities rather than a physical symptom.

Look for changes such as:

• Unusual irritability
• Reduced concentration
• Difficulty performing previously normal activities
• Changes in walking or balance
• New weakness
• Seizures
• Regression in previously acquired developmental abilities in younger children

Some brain and central nervous system tumours can cause neurological or behavioural changes.

A sudden or significant neurological change should always be evaluated by a healthcare professional.

When Should Parents Consult a Doctor?

One isolated symptom does not mean that a child has cancer. Childhood cancer is rare, and many of the symptoms mentioned above are much more commonly associated with infections, nutritional problems, injuries or other medical conditions.

However, parents should consider medical evaluation when a symptom is:

• Persistent
• Unexplained
• Getting worse
• Repeatedly returning
• Associated with several other symptoms
• Interfering with normal activities, school, sleep or play

The WHO emphasizes that early diagnosis involves awareness of symptoms, timely clinical evaluation and access to appropriate treatment.

Parents should also avoid relying on internet searches or self-diagnosis. A healthcare professional can determine whether further tests or specialist assessment are necessary.

Learn more about our expert Oncologist care services here.

How Is Childhood Cancer Diagnosed?

If a doctor suspects that a child’s symptoms require further investigation, the evaluation may involve a detailed medical history and physical examination followed by appropriate tests.

Depending on the symptoms, doctors may recommend:

• Blood tests
• Imaging studies
• Ultrasound
• X-ray
• CT or MRI when appropriate
• Other specialized investigations
• Biopsy or pathology testing when required

The exact tests depend on the child’s symptoms and suspected condition. There is no single test that can diagnose every childhood cancer.

WHO notes that an accurate and timely diagnosis is essential because different childhood cancers require different treatment approaches.

Can Childhood Cancer Be Treated?

Yes. Many childhood cancers can be treated, and outcomes have improved significantly where children have access to appropriate diagnosis, treatment and supportive care.

Treatment depends on the specific type and stage of cancer and may involve:

• Chemotherapy
• Surgery
• Radiation therapy
• Targeted or other specialized treatments in selected cancers
• Supportive and nutritional care

WHO reports that more than 80% of children with cancer can be cured in high-income countries where comprehensive childhood cancer services are accessible, while survival remains lower in many low- and middle-income settings because of delays in diagnosis and barriers to treatment.

This highlights why recognizing concerning symptoms and seeking timely medical evaluation matters.

What Parents Should Remember

The most important message for parents is awareness without unnecessary fear.

A child having a fever, headache, bruise, stomach ache or tiredness does not mean they have cancer. These symptoms are common in childhood and usually have other explanations.

What matters is noticing when something is unusual for your child, persistent, unexplained or progressively worsening.

Parents can help by:

1. Knowing their child’s normal health and behaviour.
2. Paying attention to persistent changes.
3. Keeping track of recurring symptoms.
4. Consulting a pediatrician when something seems unusual.
5. Following recommended investigations if advised.
6. Seeking urgent care for severe symptoms such as difficulty breathing, seizures, severe weakness or a rapidly worsening condition.

Early attention does not mean assuming the worst—it means giving the child the opportunity to receive the right diagnosis at the right time.

Conclusion

Childhood cancer is uncommon, but understanding its possible warning signs can help parents recognize when a child’s symptoms need medical attention. Persistent fever, unexplained tiredness, unusual bruising or bleeding, ongoing bone pain, unexplained weight loss, persistent lumps or swelling, abdominal enlargement, recurring headaches with vomiting, changes in vision, breathing difficulties and significant neurological or behavioural changes are some signs that should not be casually ignored.

At the same time, these symptoms do not by themselves diagnose cancer. Many common childhood illnesses can cause similar problems. Only a qualified healthcare professional can determine the underlying cause through appropriate clinical evaluation and, when necessary, diagnostic tests.

For families in Bikaner, timely consultation with an experienced pediatric or pediatric oncology team can help ensure that concerning symptoms are evaluated appropriately. At Marwar Hospital, Bikaner, parents can seek professional medical guidance when they are concerned about unusual or persistent symptoms in their child.

When it comes to a child’s health, awareness, timely evaluation and appropriate medical care can make an important difference.

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