Could these things be warts or skin tags?

Hello,
I have these things that started out looking like little raised bumps on my ankle and feet areas. Now after a few years some of them have grown a little larger and have traveled up to just the lower part of my calves. Now I have seen the planter looking warts and these don't resemble those but moe like raised bumps and one of the larger ones has a little small thing in the middle that I kind of scratched off and now it's dry. I have often wondered if these are warts and I am wondering if the caster oil treatment might work on them. Does anyone know if these things could be warts or skin tags and if so what to do?
Thanks,
Robbie
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