How babies signals about their any problem?

Babies after born they have no language to utter. But they have the realization of something. Only language is them is crying. Everyone is familiar with the babies crying. With an instant born most of the babies are found in crying. It is their first language. It is due to for finding a new environment. In this new environment he found some deviation in terms of temperature and light. The temperatural deviation from past stimulates him to cry. With a few time he abled to cope with the temperature. You may see some babies are start crying in night. Sometimes this crying become so loud and continuously he remains it. In this time he try to signals any of their physical disorder. Babies sometimes suffer from gas bubles and abdominal pain. These gas bubles makes an irritability. Then they cries.