There are several forms of skin cancer. You should be aware of the symptoms so that you’re aware of any concerning changes in your skin or moles. https://www.macmillan.org.uk/cancer-awareness/skin-cancer-awareness-month
Asymmetry, Border, Colour, Diameter, Elevation, Firm, Growing are the words we use to describe moles we should be concerned about. Find out more about the ABCDEFG rule here: https://www.melanomauk.org.uk/the-abcde-rule
Skcin have developed an app that will help you understand your risk of skin cancer. It will also help you monitor and assess any lesions.
https://www.skcin.org/