I could this be skin cancer

The only person who can confirm this is your Doctor, get yourself an appointment

Thank you for your reply I'm so confused but anxious about it now il make an appointment ASAP to be sure it's nothing to worry about it started as a little red spot and has progressed to this, I didn't want to make a big deal of it Incase it's nothing to worry about

I included pictures but I can't see them up here

I'm glad you are going to the doctor ASAP.  There are so many different things it might be, most of which are simple. How long is the mark on your foot now and what did it look like when it began?   Does that part get a lot of sun exposure?   Most skin cancers are basal cell cancers and they are pretty common, they usually show up on sun exposed areas, more common among older people, and they are almost always successfully treatable.  Treatment not very complicated.  Both my parents had this on their faces, i think. i remember my dad had it on his ear.  My mom had it too, i can't remember where it was, only that it was a sun exposed area, it was removed at a simply outpatient surgery, decades ago (she is now 96).  If caught early, most skin cancers are not serious.  Whatever it is you have, you are catching it early.  I hope it's something simple, some kind of rash or something.  You can look up skin cancer photos on google and see if it looks like what you're seeing.  They look ugly but they can usually be cured.  let us know what the doctor says.