Low immunity in men is usually caused by the following conditions. From the point of view of Chinese medicine, it is usually caused by deficiency, and men with kidney deficiency can take Cordyceps sinensis to help improve immunity. It can also be triggered by blood deficiency. Men with blood deficiency can take drugs such as Salvia, Safflower and Rhodiola, while men with low immunity due to qi deficiency can take Chinese herbs such as Scutellaria, Radix et Rhizoma, Ginseng and Radix Angelicae Sinensis to improve the immunity of the body. If from the perspective of Western medicine, usually men with low immunity can eat thymus peptide, spleen aminopeptide, thymus pentapeptide or can take food containing more vitamins and trace elements, which can also increase the immunity of the body. In case of severe immune deficiency, gammaglobulin injections of albumin for injection and compounded amino acids can improve the immunity of a person.