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.
The lip sore is called a cold sore or fever blister (so named because they are often triggered by colds or fevers). Other triggers include sunburn on the lips, certain foods, anxiety, certain dental procedures, and any condition that reduces the body's resistance to infection.