1. Adjust sleeping position: Let the child lie on their side or back with their head slightly raised to avoid saliva accumulation in the throat and coughing when lying down.
2. Oral hygiene: Keep your child's mouth clean, brush their teeth regularly, reduce bacterial growth in the mouth, and help reduce excessive salivation.
3. Observe diet: Pay attention to your child's diet and avoid consuming too many foods or drinks that stimulate saliva secretion before bedtime, such as candy, juice, etc.