Coolness, also known as slightly cold, is a Chinese medical term. Foods, including fruits, which are cooling in nature help to clear heat, relieve fire and detoxify the body, and are generally not suitable for patients with cold extremities, chills, sore lower back and knees, and those with frequent abdominal pain and diarrhea. Common cool foods are the following: 1, cereals: such as millet, wheat, barley, mung beans, buckwheat, etc.; 2, vegetables: such as shiitake mushrooms, marjoram, cucumber, winter melon, vegetable melon, bitter melon, lettuce, spinach, yellow cauliflower, radish, purple hornbeam, tomatoes, eggplant, celery, beets, loofah, asparagus, kelp, etc.; 3, meat: such as bullfrog, rabbit, duck, fish, duck eggs, etc., as well as sea crab, sea shrimp, abalone, clams, scallops and other aquatic products; 4, fruits: common including apples, pears, mangosteen, dragon fruit, mango, loquat, persimmon, grapefruit, kiwi, watermelon, melon, etc.; 5, other: such as honey, green tea, mint, fat sea, honeysuckle, chrysanthemum, wolfberry, etc., can be infused with water to drink can also be cooked with other ingredients. Cool food is suitable for patients with influenza, tonsillitis, pneumonia, hemorrhagic fever and other diseases to help relieve the condition. From the Chinese medicine point of view, they are suitable for patients with heat symptoms such as Yin deficiency, Yang hyperactivity and deficiency heat. However, it should be clear that food does not play a role in treating the disease, but can only assist in relieving symptoms and promoting recovery from the disease. If the disease should be actively treated under the guidance of a doctor for the primary disease to avoid aggravation.