RECURRENT VOMITING
This is also known as cyclic vomiting and periodical vomiting. It is characterized by recurrent attacks which may be weeks or months apart. They come on without any apparent cause and from the descriptions and explanations given in medical science very little can be done medically to control the vomiting which at the end of two or three days will cease spontaneously. The attacks recur at different intervals, usually less often, gradually decreasing until they cease altogether when the patient is about the age of ten or twelve years.