'Three Months' Colic'

In the first three months of life, rhythmic attacks of screaming, which are almost entirely confined to the evenings and cannot be explained by any of the known causes of crying, are a troublesome com- plaint which is familiar to all who are concerned with the care of well babies.It is commonly called 'three months' colic', because it gets better by the age of 3 months.For the sake of brevity I shall henceforward term it 'colic'.This paper sets out to marshal the known facts about the condition, to discuss the theories as to its possible causes, and to present for comparison an analysis of data concerning 50 babies who suffered from it and 50 babies who did not.* Subsequent observation in a larger number of babies has suggested that the figure is too high.