Every summer in the Qing Dynasty (from the first day of May to the fifteenth day of July in the lunar calendar), the imperial court distributed Qingshu soup in various palaces for concubines, princes and eunuchs to drink to prevent and treat summer diseases. There are several points in the treatment of summer heat disease by ancient physicians. For example, in Zhang Fengkui's treatise on "The Complete Book of Injury to Summer", it is mentioned: "Summer sickness should be pungent and cool, followed by sweet and cold, and finally sweet and sour, so it is unnecessary." ; Wang Mengying's "Warm Jingwei" records: "Summer heat hurts qi and yin, and it should be effective to clear the summer heat and benefit the vitality." ; Wang Lun's Miscellaneous Doctors also mentioned: "The best way to cure summer heat is to clear the heart and diuresis." Qinggong Summer Disease Prevention and Treatment Prescription 1, Elsholtzia Decoction-consists of Elsholtzia, Lentils (fried), Magnolia Officinalis, Poria, Glycyrrhiza uralensis, Astragalus, Pericarpium Citri Tangerinae, Chrysanthemum, etc. , decocted in water. Functions: clearing summer heat without hurting qi, eliminating dampness without hurting yin, strengthening spleen and stomach, and clearing the head. 2. Summer soup-consists of Elsholtzia, Lentinus edodes (fried), Magnolia Officinalis, Poria, Glycyrrhiza, Astragalus, Pericarpium Citri Tangerinae, Fructus Chaenomelis, Rhizoma Atractylodis (fried), Atractylodis Macrocephalae (fried), Herba Agastaches, Sandalwood, Ophiopogon japonicus, Mume Fructus, Fulonggan, etc. , fried clothes. Function: It fully embodies the principles of "relieving summer-heat, astringing body fluid with sour taste, benefiting qi and nourishing yin, eliminating dampness and benefiting water". From the composition of these two prescriptions for relieving summer heat, we can understand the thinking of preventing and treating summer heat disease in traditional Chinese medicine at that time and the intention of prescribing prescriptions by imperial doctors in Qing Dynasty.

Several drugs for relieving summer heat in midsummer lentils are the most commonly used drugs (foods) for treating summer diseases. Lentils are flat and sweet, and belong to the spleen and stomach. Has the effects of invigorating spleen, benefiting qi, eliminating dampness and relieving summer heat. In summer, lentils are good at eliminating dampness and regulating the stomach. It has a good therapeutic effect on acute gastroenteritis, summer heat and cold, vomiting and diarrhea in summer. However, it should be noted that lentils should be cooked until they are fully cooked, because uncooked lentils can easily cause toxic reactions such as headache, vomiting, diarrhea and palpitations. Astragalus membranaceus injures qi and yin in summer, and Astragalus membranaceus nourishes qi and consolidates exterior, which can prevent excessive sweating and avoid collapse due to consuming body fluid and injuring qi in summer. Ophiopogon japonicus sweats too much in summer, which is easy to make the body lack of body fluid. Ophiopogon japonicus is cool and sweet, soft and juicy, good at nourishing yin and promoting fluid production, clearing heart and moistening lung, and can prevent and treat yin deficiency, body fluid injury, summer heat, anxiety and thirst. Mume Mume is flat and sour. Chinese medicine believes that "sour and sweet turn yin". Eating dark plum has the effect of promoting fluid production and quenching thirst, and can prevent and treat symptoms of summer heat, polydipsia and body fluid injury. Chrysanthemum chrysanthemum is cool, sweet and bitter, and has the effects of dispelling wind and clearing heat, nourishing liver and improving eyesight. In hot summer, chrysanthemum tea can be brewed as a beverage, which has the effects of clearing away heat and relieving summer heat, relieving polydipsia and relieving fatigue.