The main effect of cucumber with milk is to nourish yin and clear heat, and the main effect is to treat people with yin deficiency and fire, which is more suitable. The reason why it has such efficacy and effect is due to the pharmacological effects of both, which have overlapping parts with each other. The main effect of cucumber is to clear heat, fire, detoxification and water, while the action site of milk corresponds to the body’s stomach and lung meridians, with the effect of nourishing the deficiency, benefit the spleen and stomach, and produce fluid and moisten the intestines. Therefore, the superposition of the two has the effect of nourishing Yin, clearing fire, and benefiting essence and blood. For patients with diarrhea caused by weakness of the spleen and stomach, it is not suitable to eat cucumber with milk, which will aggravate the cold and dampness in the body, which will aggravate the diarrhea, and can also hurt the body’s yang energy more, so it is not recommended in this case.