"People suffering from sunstroke, fever, sweating, strong wind and slow pulse are called strokes."
"The sun has a stroke, and the yang floats and the yin is weak. The yang floats and the heat is spontaneous, and the yin is weak and sweaty. ..... Guizhi Tang is the main one. "
Guizhi Decoction consists of Ramulus Cinnamomi, Radix Paeoniae, Radix Glycyrrhizae, Rhizoma Zingiberis Recens and Fructus Jujubae.
Syndrome of exterior and interior of solar apoplexy is due to wind damage to human body surface, which leads to fever, wind diarrhea and sweating. Therefore, Guizhi decoction should be used to treat wind injury, sweating will hurt yin, while Guizhi Ginger Glycyrrhiza will help defend Paeonia lactiflora and Glycyrrhiza to regulate camp. Therefore, Guizhi decoction can coordinate ying Wei and dispel cold.
Divergence: Ramulus Cinnamomi is used to disperse exterior wind, because wind evil invades the skin on the surface of human body, which means both dispersing wind evil and sweating.
As for why Guizhi perspires and relaxes tendons in TCM books, it is because Mahuang decoction and Mahuang decoction should be distinguished. Mahuang decoction perspires strongly, while Guizhi decoction perspires weakly. Another reason is that muscle relaxation can release muscle abscess, and it is easier to drive away evil spirits, which is what you said, opening the door to give evil spirits a way out, not just a sweat hole.
Taking antiperspirant and relieving exterior syndrome is to avoid cold, so as not to be injured by wind-cold evil again. For example, it is recorded that after taking medicine, you drink hot porridge and sweat all over your face to avoid the cold.