I was severely sunburned as a child, numerous times (42 yrs old now). I never had freckles on my back before the sunburns but developed lots of them over the years. Now I have four spots on my back that appeared as scaly patches, that bleed and ooze and are raised. They are also circled by redness. I have had them for about 5-6 months. Should this be checked for skin cancer?