hello mi.

I hope she feels better soon! For a 4-year-old with dry cough and nausea, you can try a honey and warm water mix, but make sure your little one is old enough for honey (it’s usually safe after 1 year). A teaspoon of honey before bed can help soothe the throat. You can also try steam, like a warm shower or a bowl of hot water with a towel over her head to help with the coughing. But if it's getting worse or the nausea doesn't go away, it’s a good idea to consult a doctor, just to be safe.