Here is what ayurveda tells about application of herbal paste

General
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  1. Use fresh preparation only
  2. Apply in the direction of hairs
    3 if applying for pain or swelling use circular motion
  3. Do not let it dry completely
  4. Remove it before it get cracked
  5. Do not apply the fresh layer of paste on the previous one
  6. 1/2 to 1 cm thickness
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Insightful post, sometimes using proven ayurvedic remedies is good as its about natural healing

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informative