My baby is 45 days old & daily crying at night what is the reason of crying

Crying is how babies express themselves. check on ur baby when he cries & see what he needs. He could be hungry, wet or just needing a cuddle. The longer he cries, the longer it will take to calm him down. If there is sudden onset of regular & prolonged periods of crying, then it may be due to colic. colic usually begins in the first few weeks after birth & lasts till the baby is about 3months old. this often occurs at the same time every day. comfort ur baby by - giving him small but frequent feeds, & burp him well - cuddling him close to u, swaying or rocking him - Talking or singing softly to him