Castor oil packs. I'd go near constant in the beginning. Cover the pack with Saran Wrap, then apply heating pad. Give it 30 days, see what happens. After awhile you may want to make a paste out of castor oil and baking soda and keep applying to draw the ooze out.
https://queenofthethrones.com/
"Ancient Egyptians were the first to mention castor oil as a medicine and since then this oil, also known as Palma Christus, has been used as a folk medicine [15, 24, 25]. Castor oil packs had been highly popularized by Edgar Cayce, “The Sleeping Prophet”, who recommended, in particular to eradicate tumors near the breast surface. The seed oil from the castor bean Ricinus communis is very rich in Δ-12-hydroxy-9-octadecenoic acid (ricinoleic acid, about 90 %, Fig. 3), and contains as minor components phenolic compounds, such as p-coumaric acid, ferulic acid, o-coumaric acids, syringic, cinnamic, chlorogenic, neochlorogenic, and gallic acids [26–29]. Quite a few of triglycerides of R. communis containing ricinoleic acid, have as major components triricinolein (Fig. 4) and, in addition, diricinoleo-triglycerides with ricinoleic acid at the 1- and 3-positions (Fig. 3) [30]. Castor oil is hydrolyzed in the small intestine by pancreatic enzymes, which results in the release of glycerol and ricinoleic acid, although 3,6-epoxyoctanedioic acid, 3,6-epoxydecanedioic acid, and 3,6-epoxydodecanedioic acid (Fig. 4) also appear metabolites. Castor oil and ricinoleic acid easily penetrate deep into the skin and they enhance the trans-dermal penetration of other chemicals."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327996/