There is no direct relationship between a light diet and constipation. A light diet will not cause constipation, but if the diet is single or improperly structured, it may lead to constipation. Constipation is a symptomatic manifestation of the body’s difficulty in defecation and reduced defecation due to internal as well as external factors. If dietary fiber intake is insufficient, and a light diet can not stimulate and aggravate the cause, and will not lead to constipation. Moreover, a single dietary structure, such as insufficient fat intake, can lead to constipation; an inappropriate dietary structure, such as eating less coarse grains and vegetables and more fine foods, can also lead to constipation. The lack of fiber and water dietary pattern will induce constipation, it is recommended to eat more fruits, vegetables and coarse grains, to achieve a diversified diet structure, so as to prevent constipation. If the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to clarify the cause and targeted treatment, do not take medication, so as not to delay the condition.