Is it true that a tattoo over birthmark is linked to increased risk of skin cancer? (Photo)

I recommend you have it checked by a skin specialist (dermatologist or plastic surgeon), before you have any tattooing or laser treatment. As risks and best treatment vary according to nature of lesions. Covering up a naevus with a tattoo doesn’t increase the possibility of it turning into cancer, but will make it more difficult to examine and assess in the future for any changes. It might be safer to have it removed and if needed tattoo the scar. Laser would work well if the lesion is vascular. 

This is a CALM or Cafe Au Lait Macule. You can tattoo over this if you wish, as there is no increased risk of skin cancers in this lesion. All the best, Dr Davin S. Lim. Brisbane. Australia.