In the life of your new baby, there is an important change, the transition to a totally different world from the one in which it has developed in the last 9 months.
Now he experiences new feelings, hears sounds, sees different things, smells and tastes, learns that the world is a safe and receptive place. He begins to become familiar with the faces, voices, smells and sounds around him and tries to guess how to communicate his needs and desires.
You don't understand how you communicate better than you do, but you have to get in touch as much as possible to understand yourself. You learn to understand the signals he gives you, and he learns how to best communicate to you what he wants.
As you learn each other's signals, it is very important to spend time together and communicate through touch, having eye contact.
By this approach you find out what the desires are and you discern the signals you give them, and your baby begins to feel safe in your presence.
The main way your baby is trying to communicate something to you is crying. By crying he tries to tell you that he wants to be held in arms or fed. Often, a real challenge for the new parent is to guess how to respond to what the little one is communicating.
The baby cries when hungry, cold or tired, or cries because the diaper is wet and will calm down as soon as you change it.