It is your baby's only way of communication, of letting you know that he needs you. The sooner his needs are attended to, the greater will be the relaxation and enjoyment of both you and your baby. In a baby sling your baby is in a comfortable and natural position while leaving your hands free. In some cultures it is customary that babies are held and carried a lot. In these cultures it is unusual to hear a baby cry.
Some babies have a fussy period every day, many times in late afternoon.
This fussiness is different from a baby who cries because of colics. A baby with colics has a piercing cry, sharp gas pains and often draws his legs up to his abdomen or goes rigid and arches his back. Continued crying causes the baby to develop gas and further aggravates the discomfort. Colics usually occur at about the same time every day in late afternoon or evening and can last for hours. The mother of a colicky baby may experience feelings of frustration, rejection by her crying baby and physical exhaustion from constantly trying to soothe and comfort him.