People with cold body are not suitable to drink red beans and barley tea, barley is a cool medicine, so it has the effect of clearing heat, cold patients are not suitable to use barley, because people with cold body can not be treated with cold nature medicine, it will aggravate the coldness. Red bean has the function of regulating qi and blood, clearing heat and detoxification, so red bean also has the function of clearing heat, both of these herbs have the function of clearing heat, both are not suitable for cold body. Dampness evil is divided into damp heat and cold dampness, barley and red beans are only suitable for damp heat physique whose symptoms are not serious, people with cold body will drink red beans and barley tea will damage the spleen and stomach, especially patients with cold stomach and loose stools are not suitable for eating barley.