A child with the flu needs fluids first and food second. Fever, sweating, and reduced appetite all work against hydration, so drinks matter more than meals in the first day or two. Once your child is willing to eat, the goal is calorie-dense, easy-to-digest foods that support recovery without upsetting an already sensitive stomach.
Why Fluids Come First
Fever increases a child’s metabolic rate by roughly 11% for every degree Celsius of temperature rise. That means a child burning through energy and water faster than normal, often while refusing to eat or drink. Dehydration is the most common complication of flu in children, and it can set in quickly, especially in toddlers and infants.
Small, frequent sips work better than asking a sick child to drink a full cup at once. Water, diluted juice, broth, and oral rehydration solutions are all good options. Popsicles and ice chips can help when a child resists drinking. For babies who are breastfeeding or formula-feeding, continue offering feeds more frequently than usual.
Avoid caffeinated drinks and full-strength fruit juice. Caffeine can worsen stomach symptoms, and sugary drinks can irritate the gut and pull water into the intestines, making diarrhea worse if it’s already present.
Signs Your Child Isn’t Getting Enough Fluids
Mild dehydration often shows up as decreased urine output before anything else becomes obvious. Your child may go longer stretches without a wet diaper, or older kids may simply stop asking for the bathroom. A dry mouth, darker urine, and increased thirst are early signals.
Moderate dehydration looks more concerning: dry lips and tongue, skin that feels less elastic when gently pinched, a faster heart rate, and increased irritability. Children with severe dehydration become lethargic, confused, or extremely fussy, with mottled skin and rapid breathing. If you see those signs, your child needs medical attention right away.
Best Foods During the Flu
Once your child shows any interest in eating, offer what they’re willing to accept. You don’t need a special diet. The old advice to stick to the BRAT diet (bananas, rice, applesauce, toast) has fallen out of favor. The National Institute of Diabetes and Digestive and Kidney Diseases notes that restricted diets don’t help treat viral illness, and most experts now recommend returning to a normal diet as soon as appetite comes back.
That said, some foods are easier on a queasy stomach than others. Good choices include:
- Broth-based soups: Chicken soup delivers sodium, fluid, and calories in an easy-to-digest form. The warm liquid also helps loosen nasal congestion.
- Simple carbohydrates: Toast, crackers, plain pasta, and white rice are gentle on the stomach and provide quick energy.
- Soft fruits: Bananas, applesauce, and melon are hydrating and easy to chew when a child feels weak.
- Eggs: Scrambled or soft-boiled eggs offer protein without being heavy.
- Oatmeal: Cooked thin, it’s warm, soothing, and calorie-dense for a child who can only manage a few bites.
Let your child’s appetite guide portion sizes. Several small snacks throughout the day are more realistic than three full meals. If your child only wants toast and broth for two days, that’s fine. The priority is keeping fluids and some calories coming in, not nutritional perfection.
Foods That Can Make Symptoms Worse
Greasy and fried foods are harder to break down and can aggravate nausea. High-fat meals sit in the stomach longer, which is the last thing a child with an upset stomach needs. Save the pizza and chicken nuggets for when they’re feeling better.
High-fiber foods like raw vegetables, whole-grain bread, and beans can also be tough on a sensitive digestive system. If your child has any diarrhea alongside the flu, sticking with refined, lower-fiber carbohydrates for a few days is easier on the gut.
Sugary foods and drinks deserve extra caution. It’s tempting to offer juice or sweet snacks because your child will actually accept them, but large amounts of sugar can inflame the gut and worsen diarrhea. If you’re using juice to get fluids in, dilute it to half strength with water.
Dairy Is Fine
Many parents have heard that milk increases mucus production and should be avoided during a respiratory illness. This belief dates back centuries, but studies have consistently failed to support it. In one randomized trial, researchers gave subjects either milk or a soy-based placebo and found no difference in mucus-related symptoms between the two groups. People who already believed in the milk-mucus connection were more likely to report symptoms like thicker saliva, regardless of which drink they received.
If your child wants milk, yogurt, or cheese, those are all fine to offer. Yogurt in particular provides protein, calories, and probiotics that may help with gut recovery. The only reason to temporarily avoid dairy is if your child is experiencing significant vomiting or diarrhea and seems to tolerate other liquids better.
Honey for Cough Relief
Flu-related coughing can make it even harder for a child to eat or sleep. For children over age one, a single dose of 2.5 mL of honey (about half a teaspoon) before bedtime can help. In studies of children ages one to five, honey cut cough frequency scores roughly in half and outperformed both no treatment and common over-the-counter cough suppressants. Parents consistently reported improvements in cough severity, sleep quality, and overall comfort.
You can give honey straight from the spoon, stir it into warm water, or mix it into warm (not hot) tea. Never give honey to a baby under 12 months old due to the risk of infant botulism.
Feeding Babies and Toddlers
Infants under six months should continue breast milk or formula exclusively. Both provide the fluids and calories a sick baby needs, and breast milk contains antibodies that help fight infection. Offer shorter, more frequent feeds if your baby seems too tired to finish a full session.
For babies over six months who are eating solids, you can offer their usual foods in smaller amounts alongside increased breast milk or formula. Pureed fruits, mashed avocado, and thin cereal are all reasonable choices. If your baby refuses solids entirely, don’t force it. Focus on milk feeds and watch for signs of dehydration like fewer than four wet diapers in 24 hours, a dry mouth, or no tears when crying.
Toddlers can be especially stubborn about eating when sick. Offering a few bites of familiar comfort foods alongside steady sips of fluid is more productive than trying to introduce anything new. Keep portions tiny and options simple.