Seconded! There is a wealth of information pertaining to castor oil packs online, much of which speaks of the dissolution of cysts via corrected circulation.
The cyst is an accumulation of un-eliminated waste. All one must do is to stop consuming the waste that accumulated in the first instance and then help the body along in its own cleansing and healing process.
Herbal aids for the spleen include the following: barberry, camomile, hyssop, parsley, peruvian bark, poke, wahoo and wood betony. For cysts, apple cider vinegar, brigham tea, burdock root, cayenne, chaparral, honey, mullein, plantain, and sarsaparilla are said to be effective. A combination of two or more of the above listed herbs would surely prove most effective.