All babies cry but if your baby cries for hours on end, especially after feeding, then colic may be to blame.
In his book When Your Child is Sick – What you can do to help, Prof Alf Nicholson, a consultant paediatrician and RCSI professor of Paediatrics at Children's University Hospital, Temple Street, says although diagnosing colic is never quick, the ' Wessel Rule of Threes' is the system traditionally used by doctors.
"If your baby cries for more than three hours a day for more than three days a week for three weeks, then she has colic," he explains, although he adds that if your baby is screaming hard and has a temperature or other symptoms, then a serious bacterial infection, such as meningitis, must first be ruled out.
Though many studies have been done on colic, as yet no one has shown a single cause or a single cure for it, explains Nicholson.
Mother & Babies