update - January 2022
The cyst is really all but completely gone. I forgot all about it and then noticed a small bump a week ago. I squeezed and have been taking kelp again almost daily. I am also putting iodine on it. Hopefully this is the last of it.
All of my sebaceous cysts (diagnosed via ultrasound as 8 mm in size) seems to be completely gone. I am cautiously optimistic that it is gone for good, but I will keep an eye on it for a few weeks. I am not doing the iodine on it since it is no longer there. It has taken about 6 weeks of nearly daily application to the cyst. At times, the cyst would burst but generally, it seemed to shrink.
I would clean it with antiseptic and cover it when it burst. I also found that the skin on the cyst seemed to be rougher at times, and then would peel off with time. The iodine would irritate my skin, mostly making it red and when it got to be too much I would stop for a day or two. Also applying the iodine would at times make it itchy or cause it to sting and then at other times, would have no effect at all. I am going to keep taking the Kelp tablets for another two weeks (one tablet every three days). I used Nature's Way 600 mg of Kelp for this.
I applied iodine tincture to my 8 mm complicated sebaceous cyst daily and that, with a kelp tablet every three days, shrunk it considerably. It is now barely there, and I will continue to put iodine on it nightly for two weeks after it is all gone. I used a q-tip and painted the bump with iodine. I found after about two weeks, part of it popped and I cleaned and applied iodine then. It has been about a month now and it seems to have shrunk more than anything, to a flattened barely there cyst. I will keep applying the iodine and taking the kelp tablets for a few more weeks.
I am so surprised that the section on CYSTS did not list Iodine as a remedy! Iodine tincture (commonly a 2% liquid in an alcohol/water solution, found at smaller pharmacies) has a emulsifying effect on the waxy, oily substance inside common dermal cysts. Much like a warm compress would, iodine emulsifies the substance inside the cyst, making it thinner and less viscous so that it can be reabsorbed by the body.
I've had several sebaceous cysts on my scalp and, although dousing them with rubbing alcohol helps a bit, I found that iodine painted on with a Q-Tip works very quickly to shrink the cyst without having to squeeze it and break the skin (which opens you up to infection).
Iodine tincture comes in a tiny dark-colored bottle ad it found at smaller pharmacies; the big box stores are more likely to have a larger bottle (3-4 oz) of povidone iodine solution, which is more dilute but should be effective as well. The added bonus is, these solutions are powerful antibacterials (even against the dreaded MRSA) and are used in hospitals.