It is quite obvious that when a baby cries, he/she is really just trying to tell you something. So being a parent, you need tounderstand the core reasonthat made your baby cry and what can you do about it.
Now try to consider what your baby could be thinking:
Your baby might be hungry
Most newborns eat every few hours round-the-clock. Some babies become frantic when they are hungry. They might get so worked up by the time you start feeding them that they gulp air along with the milk, which could cause spitting up, trapped gas and that could result in crying more often.
To avoid such a scenario, notice the early signs of hunger and feed your baby accordingly. If your baby begins to gulp during breastfeeding, take a break. Also take time to burp your baby during and after each feeding.
Above all, keep your diet in check, if you think that a certain food or drink is making your baby fussier than usual, then try to avoid it for a couple of days and see if it makes a difference or not.
Your baby might want to suck on something
For most babies, sucking could be a comforting and a soothing activity. It is actually a natural reflex. If your baby is full but still fussy try a clean finger or a pacifier.
Your baby might be tired
Newborns usually sleep up to sixteen hours a day or even more. Exhaustion could make a baby fussy so you might want to consider the fact that your baby wants to sleep more.
Your baby might be wet
A wet or soiled diaper is a certain trigger for tears for some babies. You might want to make sure that your baby is clean and dry at all times.
Your baby might want to move
Sometimes, all a baby want is a change of position so if you want to soothe a crying baby, try rocking him/her or give him/her a walk through the house. Also, keep all the safety precautions in mind; try a baby swing or a vibrating infant seat. Or you could always take your baby outdoors in a stroller.
Your baby might want to be bundled
Sometimes when a baby is fussy, try wrapping your baby in a blanket or a cotton wrapping sheet. Some babies feel most secured when swaddled up. So you might want to try that.
Your baby might feel hot
A baby could be uncomfortable because he/she feels hot. This alsoimplies to a baby who's feeling too cold. Add or remove a layer of clothing as per your baby’s needs.
Your baby might be lonely
Your baby could be lonely and that could make him/her a little fussy. Sometimes it is as simple as seeing your face, hearing your voice or being cuddled up with you that could make your baby to stop crying.
Your baby might want a peaceful environment
Too much noise, movement or visual stimulation might bring your baby to tears. Take your baby to a calmer environment or place your baby in the crib.
Also, remember that many babies might have predictable periods of fussiness during the day. This actually helps your baby get rid of excess energy. There might not be anything that you could do than to comfort your baby as the crying runs its course.
This could take a while but with the passage of time and a little effort you might be able to identify your baby's needs by the way he or she is crying.
 Mayoclinic.org. Infant and Toddler Health URL http://www.mayoclinic.org/healthy-baby/ART-20043859?p=1