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.
Cold sores: Introduction. Small, painful, fluid-filled blisters that occur on the skin, mouth or nose and especially on the lips. Pain and tingling is often felt a day or two prior to the blisters occurring. Cold sores are very common. They are caused by the herpes simplex virus and are contagious.