Herein will be explained how to prepare and apply castor oil packs, and what you will need to do so.
Suggested Usage
 Pain relief (e.g. joint pain)
 Inflammation
 Nausea
 Induce relaxation  Lung congestion (and breathing difficulties due to spasms)  Hardened or swollen tissues (e.g. areas such as the liver, kidneys, lymph nodes, spleen, etc.)

Soft, flannel cloth (cotton or wool) Cut flannel to the appropriate size (e.g. 10 to 12 inches to cover the abdomen).
Cold-pressed castor oil Available at most health food stores.
Wax paper or plastic wrap Available at most convenience and grocery stores.
Heat source Preferably a non-electric source such as a hot water bottle. But you can still use an electric blanket or heating pad, if necessary.

Written Instructions
1) Fold the cloth into a two-to-four-inch thickness.
2) Saturate the cloth with the cold-pressed castor oil.
3) Apply the cloth directly to the skin on the area that needs treatment.
4) Place a piece of wax paper or plastic wrap over the soaked flannel cloth.
5) Apply heat over the wax paper or plastic wrap covering the soaked flannel cloth.
6) Maintain in place for at least an hour.
7) Leave on overnight, if necessary.
8) The recommended frequency for use of castor oil packs is three to seven times per week.
9) The flannel pack does not need to be discarded after one application. It may be kept in a glass container in the refrigerator for future use.

Video Instructions
Basic and brief tutorial:
In-depth tutorials:

Thanks to Grape Gate