Vicks VapoRub should not be applied to any part of the baby’s body. You may apply VapoRub on the feet of children older than two years. Vicks BabyRub is safe to apply on the feet of babies older than three months. Putting BabyRub on your baby’s feet and then covering the feet with warm socks or warm towels can help suppress the symptoms of cough and cold. Massaging the baby’s feet can help them relax further.