Sometimes babies just cry.
Of course, there are also tears that have no explanation at all. Particularly in the first 4 months of life, there will occasionally be periods of crying that don’t seem to have a solution. That’s because, they don’t. Sometimes babies just cry. Just like you sometimes have bad days, your baby may experience times of increased sensitivity or sadness. He might also be gassy, or teething, or just plain not feeling well. And other times, they may just want to cry.
So know that even if you can’t identify a specific reason your baby is crying, it doesn’t mean you are doing anything wrong. Sometimes… babies just cry.
However, if your baby is crying more than usual, or if his cry is high-pitched, contact your doctor. You know your baby's pattern better than anyone else, so if you notice anything unusual like a weak cry or moan, a different pattern of crying, or if it looks as if your baby is in pain, don't hesitate to contact your doctor. A sudden shrill cry followed by a brief silence and then more crying may also indicate pain.