If the apparent visual magnitude of the Sun is -26.5 and that of the full moon is -12.5, what is the light intensity ratio of sunlight to moonlight received at Earth on the day of the full moon?
Symptoms of a cold sore can include: 1  a tingling sensation, redness and swelling around the lip before the cold sore develops. 2  small, fluid-filled blisters which break open and develop a yellow crust (scab). The scab usually falls off around seven days later.
About Cold Sores. Cold sores are small and painful blisters that can appear around the mouth, face, or nose. Sometimes referred to as fever blisters, they're caused by herpes simplex virus type 1 (HSV-1). Kids can get cold sores by kissing or sharing eating utensils with an infected person. Colds sores in the mouth are very common, and many kids get infected with HSV-1 during the preschool years. The sores usually go away on their own within about a week.