baby crying with her momma always but she is fine with her grandparents not even crying why?.

A. may be colic if the child is crying at this age it can be due to either teething pain or it might be a part of colic pain due to some digestion problem or it might be due to nasal blockage or some body pain or ear pain/ infection / urine infection or which might be initiation of a viral fever also. also look for fever, oral ulcer, insect bite or skinrash / perianal rash and allergy. you have to treatd according to the findings so better to visit a doctor.