From a weak whine to all-out screaming - your newborn is trying to tell you something.
It is easy to get frustrated when your baby cries. He cannot tell you what is wrong and will just keep bawling until his needs are met.
But crying is, in itself, a form of communication for your newborn, said Dr Simon Ng from Babies and Children Specialist Clinic at Mount Alvernia Hospital.
He may be hungry, frightened, in pain or experiencing some discomfort, and craves your attention.
And, contrary to popular belief, babies do not cry to be "difficult" or to irritate their parents and caregivers, said the consultant neonatologist and paediatrician.
Babies have different types of cries, from the soft whine to the loud, wild scream. The crying can last for a couple of minutes or go on for hours. There may be plenty of tears, or none at all.
Each is an indication of a problem that your child is experiencing. Here is how to decode them.