I've been to a dermatologist & have had a lot removed & she has also injected a few with a yeast I think is what she called it but basically told me It's due to my immune system being so messed up. Doesn't help when I am so self conscious that I won't go to swim parties or wear shorts & live in NC!
Warts could be a concern. Usually our body controls the growth of warts. It is usually caused by a virus. It could have been dormant in your body. Drugs to control your inflammation can cause your body to not go after the warts. If you haven't already done so, see your doctor. I am not sure about skin tags, and moles.
I am new to this disease so I don't know specifics yet, but I worked in health care so I know some basic stuff. Don't listen to what people tell you here as far as advice, unless that advice is to see your doctor.
I hope you get some better answers. Let us know what happens!
-Andrea