It consists of a papule from which the contents are not easily expressed. When inflamed these lesions form pustules and nodules. The open form of comedo, called a blackhead, is rarely inflamed. It has a dilated opening from which the oily debris is easily expressed.
The Tropic of Capricorn is the circle marking the latitude 23.5 degrees south where the sun is directly overhead at noon on December 21, the beginning of winter in the northern hemisphere.
Being born on the cusp or the borderline of the previous sign to you is actually a karmic blessing Capricorn. These are the dates of the first few days of Capricorn, that is between the 21st and 28th of December. If you are indeed born between these dates you borrow considerably from the star sign before you.