A blood blister forms when skin and small blood vessels are damaged without breaking the skin. Trapped beneath the skin surface is some blood and skin fluid. Blood blisters are commonly caused by accidents in which the skin is pinched by a tool or a heavy weight, or they may occur from constant rubbing back and forth.
1 Sunshine hours in Chicago, Illinois range between 3:42 per day in December & 10:14 for each day in July. 2  The longest day of the year is 15:02 long and the shortest day is 8:57 long.  The longest day is 6:04 longer than the shortest day.
August 18 the Cubs lost to the Los Angeles Dodgers 2â1 in a 21-inning contest, the longest game ever played at Wrigley Field and in Cubs history (by time). The game had been suspended due to darkness at the end of the 17th inning the previous afternoon. The game lasted six hours and ten minutes.