Mustard oil is good for piles, headache, ear 
disease, itching, and worm infection.  Mustard 
is also beneficial externally.  A mustard paste 
is formed by grinding mustard seeds in water until 
they become a very fine powder.  This paste is then 
wrapped in some cloth.  The cloth, now containing 
the mustard paste within it is used in several ways.  
It is applied on the forehead.  It is used in cases 
of cholera where there is vomitting, crampsness and 
weakness of the limbs.  Mustard oil is massaged on the 
chest and limbs for weakness of the heart.  Mustard 
plastering is a technique that promotes quick healing.  
The mustard plaster promotes healing action at the site 
of injury by stimulating the surrounding areas 
blood flow.