The redness of the right hand between the small fish, clinical possible causes are liver disease, cardiovascular disease, lung disease, etc.. 1. Liver disease: chronic hepatitis or cirrhosis and other chronic liver disease patients, can not normally metabolize estrogen in the body, resulting in the accumulation of estrogen in the body and the expansion of small subcutaneous arteries, which appears in the palm of the thumb and the root of the little finger in the size of the fisheye piece of congestion, redness, known as the liver palm. 2. Cardiovascular disease: when part of the population’s own cardiac function is impaired, such as cardiac insufficiency, heart failure, coronary artery atherosclerosis, etc., the above conditions will make the body appear blood oxygen metabolism is incomplete, resulting in part of the palm of the capillaries appeared bruising, redness of the symptoms. 3. Lung diseases: clinically common such diseases are chronic respiratory insufficiency, pulmonary fibrosis, emphysema and bronchial dilatation, etc., the above conditions will make such people have oxygenation insufficiency, insufficient combination of hemoglobin and oxygen, which leads to local blood supply obstacles, and the palms of the big fishes, small fishes and other parts of the palm of the hand are prone to bruising, redness symptoms. There are many reasons for such symptoms, and it is recommended that the people concerned should go to the hospital for differential diagnosis in order to identify the cause and carry out targeted treatment.