Teddi Mellencamp is opening up about her health and encouraging others to take their doctors' advice seriously.The alum took to Instagram on Tuesday to share her story regarding her recent melanoma diagnosis, alongside a photo of a pink scar and a bandage on her shoulder blade.«Melanoma awareness update. Despite my anxiety, I listened to the doctors and went in for my 3-month skin check last week since my previous melanoma,» Mellencamp, 41, shared.