Hi,

You are very young and it would be unusual for a mole, if new, to be malignant. New moles can appear throughout our lives and are usually only suspicious once we get to over 40! 

If the mole doesn't fit any of the ABCDE rules, then that is also a good sign. Also, moles on the foot aren't unusual unless on the sole of the foot or under a nail & then they are treated as suspicious. 

If it was an existing mole it could become malignant due to UV damage or, in a very small number of cases, due to genetics. The fact your mole has never seen the sun, that you are very young and it doesn't score any points on the ABCDE rules means there is a very high chance your mole is fine. However, as it's causing you anxiety, definitely ask for the GP to check it again. Personally, I've had a mole removed from the sole of my foot & another on the top of my foot - both were benign. As a melanoma patient my feet haven't seen the sun since first diagnosed 25 years ago!

Good luck and I hope they can calm your fears,

Angie (Stage 3 melanoma patient)