Using Cetaphil body lotion on your 6-year-old son is generally safe and can help protect and moisturize his skin, especially after exposure to dust and outdoor elements. Here are some key points to consider:

• Gentle and Safe: Cetaphil is known for being gentle and suitable for sensitive skin, making it a good choice for children.

• Moisturizing Effect: Applying the lotion after outdoor play can help maintain skin hydration and create a barrier against irritants like dust.

• Patch Test: Before regular use, try a small amount on a small skin area to ensure there is no allergic reaction.

• Avoiding Face and Broken Skin: Be cautious to avoid applying lotion on broken skin or near the eyes.

• Consult if Skin Issues Arise: If your child has eczema, allergies, or other skin conditions, consult a pediatrician or dermatologist before use.

Overall, Cetaphil body lotion can be a helpful part of your child's skincare routine to protect against dryness and irritation from dust exposure during playtime. For personalized advice, consider consulting a pediatric dermatologist.