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Whenever late spring and early summer arrive, one feels headache and soreness in the legs, mental fatigue, reduced appetite, emaciation of the four limbs, and general weakness with lack of strength.

Buzhong Guyuan Tang (Tonify Middle and Secure Origin Decoction): Treats all symptoms associated with Zhuxia (Summer Lethargy Syndrome).
Ingredients: Renshen (Ginseng Radix), Huangqi (Astragali Radix), Baizhu (Atractylodis Macrocephalae Rhizoma), Gancao (Licorice Radix et Rhizoma) (each 1 qian), Shengdihuang (Rehmanniae Radix) (2 qian), Danggui (Angelicae Sinensis Radix), Chenpi (Citri Reticulatae Pericarpium) (each 8 fen), Jujubae Fructus (Jujube) (2 pieces). Decoct with water until approximately 80% remains, and take before retiring to bed.

Another prescription: Treats spontaneous sweating without cessation, fever with aversion to cold, weakness in the four limbs, and thirst.
Ingredients: Shigao (Gypsum Fibrosum) (2 qian, calcined), Zhimu (Anemarrhenae Rhizoma) (stir-fried with salt water), Renshen (Ginseng Radix), Gancao (Licorice Radix et Rhizoma), Chenpi (Citri Reticulatae Pericarpium), Xuanshen (Scrophulariae Radix) (each 1.5 qian), plus Xiaomai (Tritici Levis Fructus) (8 fen). Decoct and take orally.

(Attachment: Discussion on Wei Syndrome)
Shiqi (Dampness) is the qi that stagnates and steams within heaven and earth. When it rises upward, the qi is still condensed and not yet fully open; even if encountered during cold weather, it feels warm. This is the heat aspect of dampness. When it spreads and protects downward, the qi is about to flow, evolve, and disperse; even if encountered during hot summer months, it feels cool. This is the cold aspect of dampness. The heat aspect of dampness mostly affects persons with Qi deficiency, leading to Damp-Heat syndromes, characterized by a sensation of the head and face being wrapped, edema of the four limbs, heaviness of the body, and difficulty in turning or changing position. The cold aspect of dampness mostly affects persons with Blood deficiency, leading to Cold-Damp syndromes, characterized by soreness and pain in the four limbs, stiffness and limited mobility of joints, spasms of sinews and vessels, and heavy, sluggish gait. Those cases not caused by stagnant steaming qi must result from walking in rain, wading through water, sleeping outdoors to seek coolness, or failing to change sweat-soaked clothes. The dampness gradually soaks into the muscles, penetrates into the bone marrow, flows between the Spleen and Stomach, and firmly entangles around the waist and Kidneys. This causes cold muscles and painful bone marrow, weak Spleen and Stomach, and painful waist and Kidneys. If complicated by Wind-Phlegm, numbness and loss of sensation occur. If combined with dead blood (blood stasis), hardness and insensibility result. If stirred by Fire pathogen, severe swelling, pain, and unbearable suffering ensue. Depending on the pathogen contracted, the disease becomes chronic and stubborn. Cases not caused by rain or wading must result from internal injury due to raw, cold, alcoholic, or flour-based foods, mostly leading to abdominal distension and swelling. The physician must examine whether the dampness is cold or heat, deficiency or excess, whether the disease is located above or below, and whether the pathogen is external or internal. Treating according to the specific condition will likely lead to recovery.