It seems to be like Infantile colic.
It does occur in healthy infants.
It peaks at one and half month of age and resolves itself in 3-4 months.
If its associated with following, you have to show to Pediatrician
Persistent moaning or weak crying
-High-pitched, shrill cry,Irritability,Lethargy
,Change in stool (constipation
, especially with blood or mucous)
-Fussing during eating
-Poor weight gain.
You can give probiotics like sporolac half sachet mixed in water for 3days.