I know this is sort of off topic but on topic at the same time... BUT!

I frequently have problems with cysts, tumors and these sebaceous cysts that has been an ongoing problem since I was a toddler. For a long time they thought my sebaceous cysts were boils as unfortunately, they would show up in fairly unpleasant areas such as my rump and groin area where my panty lining rests.

They had put me on Doxycycline for the Lyme/Parvo and what's bizarre is I've noticed no cysts and some are even shrinking, excluding the one in my breast (it's solid and clearly not going anywhere). I did read on the bottle it's also used for acne treatment, but oddly enough - I broke out, but that may have some linkage with the pain medications combined with stress.

I stopped taking it because it made me puke, but it was nice for the time to go without the cysts that caused pain.