 [ Symptoms ] i have had a melanoma before so how can i prevent another [ Disease ] sun smart behavior helps    avoid sun exposure when possible wear sun protective clothing use a broad spectrum spf of 30 or higher and re apply it every two hours or more often if you are active wear sunglasses see an ophthalmologist every year since melanoma can also occur in the eyes do regular self skin exams and see your dermatologist as recommended usually several times per year