Recommendation for Itching Relief:a. For a 4-month-old child, use a mild, non-prescription cream like calamine lotion or a pediatric-approved hydrocortisone cream.b. Avoid using Fucibet Cream as it contains strong medications not suitable for infants without a doctor's advice.

Additional Care Tips:a. Keep the affected area clean and dry.b. Use mosquito nets or repellents suitable for infants to prevent further bites.

Consultation:a. If symptoms persist or worsen, consult a pediatrician for further evaluation and treatment.