1. Fevers - a fever that doesn't break within an hour of giving a pain reliever

    Call the doctor immediately for:

    • For any fever in an infant under 3 months, even a temperature as low as 100.4 degrees.
    • For babies older than 3 months, call your pediatrician for a low fever (under 102 degrees) if your child is acting weak, sick, or if the fever lasts for more than three days..
    • For fevers 105 degrees and up, your child should see the pediatrician the same day or go to urgent care.

    If the fever is also accompanied by an inability to drink, confusion, rash, trouble breathing, seizures, constant crying, difficulty waking, persistent vomiting, or diarrhea, call your doctor right away.

  2. Repeated vomiting or diarrhea.
    • Repeated vomiting or if your child has diarrhea or vomiting for more than 12 hours.
    • Blood in your child's stool or vomit.
    • If your child has diarrhea and pees fewer than three times in 24 hours.
  3. Abdominal Pain located in one spot.
  4. A fall that causes swelling in the injured area (arm, leg, ankle, etc.) and that your child is still babying and complaining about the next day.
  5. Any difficulty swallowing. Your child could have something lodged in his throat or may be having an allergic reaction.
  6. Any kind of rash or skin issue that makes you think "Eww, what is that? or that is accompanied by fever.
  7. Unexplained poor food or liquid intake with fever for two days or decreased urine for one day (or both).
  8. Persistent crying.

    As a parent you know your baby's pattern of crying better than anyone. If she is crying more than usual, or if her cry sounds high-pitched, or she is whimpering or moaning, see your doctor.

Sources: WebMD.com, BabyCentre, Parenting.com