In terms of shape, it is best to be square, but the corners must be smooth and not sharp. The scraping board with this shape is easy to handle when in use, and it is convenient to show different techniques. The scraper needs to be moderately thick, not too thin.
When people are deficient in qi and blood, the function of zang-fu organs is weakened, metabolites are retained, immune function is abnormal, inflammation and connective tissue diseases occur, which will cause microcirculation disorder and accumulation of metabolites. When scraping, the downward pressure of the scraper will make the blood containing toxins leak from the capillary wall with disordered permeability, forming subcutaneous "scraping". A small amount of rash will not only cause tissue damage, but also improve local microcirculation.
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