nk cells high cd4 low may be infections, connective tissue diseases or blood diseases and other conditions, need to be specifically analyzed. 1. Infection: nk cells that is, natural killer cells, can selectively kill and lysis of target cells, when the human body is infected with viruses, bacteria and other pathogens, nk cells can selectively proliferate, resulting in an increase in nk cells, and cd4 cells can be due to viruses and other attacks and decline, such as HIV can be selectively killed cd4 cells. 2. Connective tissue diseases: such as systemic lupus erythematosus, dry syndrome, etc., may selectively destroy cd4 cells, and NK cell reactivity increases, resulting in an increase in nk cells and a decrease in cd4. 3. blood disease: like selective nk cell increase leukemia, may be due to nk cell excessive increase, resulting in cd4 because the patient malnutrition and other reasons and decline. nk cell high cd4 low may also be other reasons, it is recommended that the patient timely report to the doctor, under the guidance of the doctor to improve the relevant examination, to take targeted measures.