What’s Causing and How to Treat a Baby’s Cough Around 3 Months Old

The baby is about to turn 3 months old. For the past two and a half months, there have been occasional dry coughs. After treatment at the hospital, the cough returned after about a week. Sometimes the cough is accompanied by nausea, and the baby frequently scratches the scalp, face, and nose, and likes to kick at adults’ bellies. Sleep is restless, curled up, not knowing what’s wrong? Why does it keep coming back?
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