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.
Fever blisters, also called cold sores, are caused by the herpes simplex virus, type 1. The blisters can occur on your lips, cheeks, chin, gums or nostrils. You might experience a tingling sensation one to two days before the initial fever blister outbreak of fluid-filled blisters around your mouth.