How was a grated crabapple historically applied externally to relieve headaches?
Answer
Applied as a poultice
The medicinal applications of crabapple were not limited to internal consumption; topical treatments were also utilized for acute localized issues. For the specific complaint of headaches, historical records indicate that a poultice made from grated crabapple fruit was prepared and applied externally to the affected area. A poultice is a soft, moist mass usually composed of soft plant material, sometimes medicated, applied to the body to relieve soreness and inflammation, which was the method used here to draw out pain or provide anti-inflammatory relief externally.

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