A skin patch that is adherable to human skin over a blemish on the skin has an outer layer that forms a physical barrier over the blemish when applied thereto and a hydrocolloid layer attached to the outer layer that contacts the blemish when applied thereto. A thermochromic material is on the skin patch and/or waterproof packaging encapsulating the skin patch. The thermochromic material indicates the skin patch is at a predetermined temperature.