Flaxseed alone for blood deficiency, fluid deficiency, intestinal dryness constipation has a certain effect of laxative, but constipation type many and single drug efficacy is limited, it is recommended that people with treatment needs to consult a physician to identify the evidence of the combination. Constipation in traditional Chinese medicine is divided into heat constipation, cold constipation, deficiency constipation, gas constipation and other types of evidence, blood deficiency, deficiency of intestinal constipation can be manifested as a lack of luster, dizziness, palpitations (rapid heartbeat, often accompanied by panic) insomnia and so on. Flaxseed is flat, sweet, and belongs to the spleen, stomach and large intestine meridian. It has the effect of laxative, commonly used in blood deficiency and fluid deficiency, intestinal dryness and constipation. Clinically, it can be used with Hovenia, Houpu, rhubarb, etc. to treat constipation of dry and hot stomach and intestines, such as hemp seed kernel pills; with peach kernel, Qiangwu, angelica tail, etc. to treat constipation of solid heat and fluid deficiency, such as lubricating pills. Taking this medicine is recommended to be under doctor’s supervision.