In case you are a first time mom then you should know that the babies can only communicate through their vocals, facial expressions, physical movements and the way they behave in the presence of strangers or relatives other than parents.
If all the above mentioned signs are showing off red, then you should first dig into the reason. The baby’s behaviour can also be due to hunger, an unchanged diaper, or the baby just being generally uncomfortable. Confirm the reason first and foremost.
If the crying is unusually high pitched then there are high chances that the baby is not only hungry or uneasy, but is facing some other issue. On the other extreme end, staying silent or whimpering too, are not good indicators.
Now take a good look at the expression, it will often be coupled with the high pitch, the face will either go red or will get scrunched.
Yet another sign that the infants show if uncomfortable is, squirming.
If your baby constantly reaches out for you when picked up by someone else, take that as a sign to visit the paediatric instantly.