Croup is an acute laryngitis of childhood, usually occurring between the ages of two and six years. The nervous element is more marked than in adults, so that the symptoms appear more alarming. The trouble frequently arises as part of a cold, or as a forerunner of a cold, and often is heralded by some hoarseness during the day, increasing toward night. The child may then be slightly feverish (temperature not over 102° F., usually). The child goes to bed and to sleep, but awakens, generally between 9 and 12 P.M., with a hard, harsh, barking cough (croupy cough) and difficulty in breathing. The breathing is noisy, and when the air is drawn into the chest there is often a crowing or whistling sound produced from obstruction in the throat, due to spasm of the muscles and to dried mucus coating the lining membrane, or to swelling in the larynx. It is impossible to separate these causes. The child is frightened, as well as his parents, and cries and struggles, which only aggravates the trouble. The worst part of the attack is, commonly, soon over, so that as a rule the doctor arrives after it is past. While it does last, however, the household is more alarmed than, perhaps, by any other common ailment.
