I had a sebaceous cyst on the outside of my upper arm which became inflamed and stayed inflamed even after antibiotics. I made the decision to have it removed thinking I would be rid of an unsightly lump.
It was very disappointing when it regrew, larger and more unsightly than before. Not only larger, it had not one but three exit points for the drainage with scarring top and bottom from the previous surgery. I never wear a sleeveless top without a cover over it.
Hope others have had a better result.