Hello and thanks for posting,

Unfortunately, we can't give you a specific medical opinion on this forum, as we always suggest that anyone with concerns, asks their GP to assess them.

Any mole that undergoes change, usually observed over a 4 to 6 week period, should get checked out. Changes that seem to revert back to normal (as in you knock or scratch a mole for example and it heals), are not generally symptoms to worry about. It would be a sustained change that should be looked at, as in it changes shape and this remains so. I hope that this makes sense. 

There is good information here,

www.cancerresearchuk.org/.../symptoms

www.bad.org.uk/.../abcd-easy-guide-to-checking-your-moles

I hope that this helps,

Best wishes,

Vanda