If an elderly person develops swelling in one hand, firstly, it should be considered that the local infection, such as bacterial, viral, other atypical pathogens, pathogenic microorganisms infection, when the local tissues develop dengue, cellulitis, then one hand will be swollen, accompanied by redness, swelling, heat, pain and other dysfunctions of the surrounding tissues. Secondly, if the elderly patient has chronic malnutrition or severe pernicious anemia, these conditions can also lead to swelling of one hand. In addition, if the patient has endocrine metabolic diseases, often in hypothyroidism, adrenocortical insufficiency will have a swollen hand. In addition, cerebrovascular insufficiency can also lead to this condition. Finally, localized vasculitis or arterial occlusive atherosclerosis can also lead to localized wrist swelling.