Some days, just getting a child to finish a glass of water feels like a battle. Cancer treatment can make that battle worse. Nausea, mouth sores, vomiting, changes in how things taste, all of it can turn a drink a kid used to love into something they won't touch, even when they're clearly thirsty.
Fluids do more than just quench thirst, though. They replace what's lost through vomiting or diarrhea. They keep the kidneys doing their job. They help the whole body keep functioning properly while treatment is underway. If your child is drinking noticeably less than usual, say something to their care team. Don't just wait and hope it improves on its own.
Drink Options
Drink | Why It Helps | Things to Keep in Mind |
Water | Usually the first thing doctors suggest | Try small sips throughout the day instead of a full glass; cold or room temp, whatever works |
Milk | Fluids plus protein, calcium, calories | Blend into a smoothie if plain milk is a struggle |
Oral rehydration solutions | Replaces fluids and electrolytes lost through vomiting or diarrhea | Only use when the healthcare team recommends it |
Homemade smoothies | Goes down easier than a full meal | Blend milk or yogurt with banana, mango, berries; add oats or peanut butter if tolerated |
Fruit juice | Adds to fluid intake, must be 100% juice | Shouldn't replace water; skip unpasteurized juice |
Soups and broths | Helpful on days solid food feels unappealing | Chicken broth, vegetable soup, or dal water tend to be easiest to manage |
Coconut water | Has natural electrolytes | Not right for every child; check with the doctor first |
Avoid these
Soft drinks
Energy drinks
Caffeinated drinks
Unpasteurized milk or juice
Herbal drinks, unless a doctor's specifically signed off on them
Getting Your Child to Drink More
Small sips every 15 to 20 minutes work better than pushing for a full glass
Let them use whatever cup, bottle, or straw they actually like
Keep drinks close by so grabbing one takes zero effort
Homemade ice pops can help, if the care team's okay with it
Praise the small wins instead of expecting the whole drink gone
No one drink works best for every child in treatment. Sometimes what works one day doesn't work the next, and that's just the way it is, nothing to worry about. The actual goal is to ensure your child is drinking what they are able to drink and is communicating with their care team at the same time. Call the doctor if they are drinking very little, have fewer wet diapers, or appear very tired. Don't sit on it.