What's this skin problem?

my mate has this scab and it started of as apparently a lil spot and she picked it and now its got to the size of a 20 pence peice with red around it. she has two.1 on the bac or her shoulder and the other on her arm which is slighty bigger with red round it.
when she picks at it a lil bit the skin flakes away really easily.

what could this be?

This could be infatigo..it can be spread very easily! She should go see doctor, he will give cream and it will be fine..x Its just a guess?

It could most defintely be a skin disease.
Most importantly she needs to see a doctor right away.
So it won't get any worse.
That is very important that she does.

I think its skin cancer but im not sure
got to doctor