A sudden fever, body aches, and unusual exhaustion can quickly turn an ordinary school day into a sick day. As flu season arrives, parents can help protect their children by understanding the symptoms, supporting prevention, and knowing when medical care is needed.

Influenza, commonly called the flu, is a contagious respiratory illness that can sometimes lead to serious complications. Children younger than 5—especially those younger than 2—and children with conditions such as asthma, diabetes, or weakened immune systems face a higher risk. Even otherwise healthy children can become seriously ill.

Recognizing the Signs of Flu

Unlike a typical cold, the flu often begins suddenly. A child who seemed well in the morning may develop significant fatigue, fever, and aches within hours.

Common symptoms include:

• Fever or chills.
• Cough and sore throat.
• A runny or stuffy nose.
• Muscle aches and headaches.
• Unusual tiredness or weakness.

Some children also experience vomiting or diarrhea. Not every child with the flu develops a fever, and symptoms can overlap with other respiratory infections. A pediatrician can help determine whether testing or treatment is appropriate.

Annual Vaccination Helps Protect Children

The Centers for Disease Control and Prevention recommends a flu vaccine every season for everyone age 6 months and older, with rare exceptions. Vaccination helps reduce the risk of flu illness and serious complications.

Some children ages 6 months through 8 years need two doses, given at least four weeks apart, depending on their vaccination history. Parents should confirm the appropriate schedule with their child’s pediatrician.

Babies younger than 6 months cannot receive a flu vaccine. Vaccination among eligible household members and caregivers helps protect these youngest family members.

Everyday Habits Add Protection

Vaccination works alongside practical steps that reduce exposure to respiratory viruses. Families can encourage frequent handwashing, teach children to cover coughs and sneezes with a tissue or elbow, and limit close contact with people who are sick.

Cleaner indoor air also matters. Improving ventilation and using appropriate air filtration can help reduce exposure in shared spaces. These habits are particularly valuable when someone in the household has a higher risk of severe illness.

Early Contact With a Pediatrician Matters

Parents should contact their child’s pediatrician promptly when flu is suspected, especially if the child is young, has an underlying medical condition, or has worsening symptoms.

Prescription antiviral medications can make illness milder and shorten its duration. They work best when started within the first 48 hours of symptoms, although children with severe illness or higher risk may still benefit when treatment begins later. Families should not assume that treatment is no longer helpful simply because two days have passed.

Recovery Requires Rest and Careful Observation

During recovery, parents can support children with rest, fluids, and close attention to changes in their condition. A pediatrician or pharmacist can advise families about appropriate medicines and dosing.

Children and teenagers with suspected or confirmed flu should not receive aspirin or salicylate-containing products because of the risk of Reye syndrome, a rare but serious condition.

Children should remain home until their symptoms have been improving overall and they have been fever-free without fever-reducing medicine for at least 24 hours. For the next five days, added precautions—such as cleaner air, good hygiene, and a well-fitting mask when age-appropriate—can help reduce spread. Families should also follow school or childcare policies.

Warning Signs Require Immediate Attention

Parents should seek immediate medical care if a child develops:

• Fast or difficult breathing, or ribs pulling inward with each breath.
• Bluish lips or face.
• Chest pain.
• Dehydration, including no urine for eight hours, a dry mouth, or no tears when crying.
• Difficulty staying alert or interacting while awake.
• Seizures.
• Fever or cough that improves and then returns or worsens.

Any fever in an infant younger than 12 weeks requires immediate medical attention. These warning signs are not an exhaustive list; other severe or concerning symptoms also warrant prompt evaluation.

Protecting children during flu season starts with preparation. Annual vaccination, everyday prevention, and timely communication with a pediatrician give families practical ways to reduce risk and respond when illness strikes.