Castor oil
A powerful remedy to get rid of skin diseases. Castor oil for skin contains triglyceride fatty acids that are well known for their antiviral and antibacterial properties. The topical application of Castor oil is very effective in curing skin infections. People suffering from skin inflammation, itching and skin irritation, are often advised to use Castor oil to ease the discomfort.
http://www.buzzle.com/articles/castor-oil-for-skin-care.html
True...Castor oil along with some baking soda is helpful for skin tags too.
a very good information
"Ricin is a protoplasmic poison prepared from castor beans after the extraction of castor oil therefrom. It is most effective as a poison when injected intravenously or inhaled, . . . a very fine particle size was necessary so that the product might be used as a toxic weapon .. ."
Castor oil was used in early days (in 60s and 70s) as a laxative. Take it orally followed by a lot of warm water in every half an hour will do it.