subject: Healing properties of castor oil [print this page] The use of castor oil in the management of skin diseases has always been known. Being very thick in consistency, it is valuable in the treatment of eczemas and psoriasis. Corns and callosities soften and gradually subside under the effect of this wonder oil. Some people also believe that castor oil has the ability to facilitate the expulsion of splinters that could have lodged into the skin. Pigmented moles, liver spots, and skin tags also respond well to regular application of castor oil.