There is no study related to the effectiveness of castor seed topical formula for lipoma. Castor has the effect of subduing swelling and pulling out toxins, diarrhea and stagnation, commonly used in carbuncle and gangrene (is a kind of poisonous sores, occurring on the surface of the body, limbs, internal organs of the acute suppurative disease), such as swelling and toxins. Ricinus communis belongs to the subduing swelling and pulling out toxins and muscle medicine, castor beans belong to the Euphorbiaceae plant castor dry mature seeds. Castor seed is also known as castor beans. Castor seed into the large intestine meridian, lung meridian. Castor seed taste sweet, pungent, flat. Castor seed can be used internally and externally. Castor seed has the effect of subduing swelling and pulling out toxins, diarrhea and stagnation. Castor seed is used in the treatment of carbuncle and poison, laryngeal paralysis (pharynx red, swollen and painful, or dry, foreign body sensation, or pharyngeal itching, discomfort, dysphagia), scrofula (mainly refers to the cervical lymph nodes tuberculosis), stool dryness and so on. Castor beans are toxic, the dosage should not be excessive, pregnant women and children are prohibited. Adverse effects of Castor Seed are not clear. If needed, please use under the guidance of a professional Chinese medicine practitioner.