It is not recommended to give Advil to a 6-month-old for teething pain. It is best to consult with a pharmacist to determine the correct dosage of medication that can be given to a child of that age. If your child is experiencing a new infection in both eyes, it is advisable to consult a healthcare provider if the symptoms persist for more than 7 days or if they are severe, such as green discharge during waking hours.