I periodically get a bump, kind of itchy on face and head. Mainly chin or forehead. Feels warm, like I ve been bitten but also feels like a pimple is forming but doesn t. Then within 24 hours it kind of crusts over a little, then disappears. When it happens, it s red. Very hard to explain. Kind of like it gets inflamed then takes a day or two to calm down. I m 56, good health. Fair skin. I do go to dermatologist every did months.