Yogi, i hope Keira gobbles down your scrambled egg 
Years ago my mother needed the same treatment for actinic keratosis on an arm. It generally affects fair-skinned people, especially those with blue eyes, red hair, freckles and a tendency to burn easily in the sun. My mother wasn't. It's also more likely where you've been abroad in hotter sunnier countries and my mother never went abroad. But there is a possibility that her skin might have been exposed to arsenic (another cause) at a place she had worked at.