For hair loss caused by blood heat, the side of the cypress leaves hair is useful, but also can be used to treat premature whitening of the beard, lung fever, cough, cool blood and other diseases, with hair, cool blood, cough and other effects. The use of the side of the cypress should be used in the physician’s diagnosis after the use of the evidence. Side of the cypress leaves taste bitter, astringent, cold, belonging to the lung, liver, spleen meridian, belongs to a kind of Chinese medicinal herbs. There are many reasons for hair loss. For hair loss caused by blood heat, it is usually useful to use the leaves of cypress to regrow hair. However, for hair loss caused by other reasons, such as insufficient kidney essence and insufficient liver qi, the use of the leaves of Juniperus communis is not useful for hair regrowth. In addition, the leaves can also be used for hair growth, cooling the blood, relieving cough, stopping bleeding, resolving phlegm, etc. Therefore, it can be used for the treatment of premature whitening of hair, lung-heat cough, cooling the blood, blood leakage (excessive menstruation or dripping), epistaxis, hemoptysis, etc. The leaves are also useful for the treatment of hair loss caused by other reasons, such as deficiency of kidney essence and liver qi. Secondly, patients need to pay more attention to rest, avoid overwork, adjust the diet structure appropriately, and rationalize the diet. All in all, patients need to go to the hospital for consultation and treatment by the doctor, and should not use the leaves of cypress by themselves.