Circulation problems, apart from fainting, are rare in this age group. The first signs of chest problems are usually attacks of acute bronchitis. In some cases, the recurrent coughing results in the condition known as pneumothorax. Childhood asthma and hay fever tend to improve between the ages of 20 and 30. Sexual intercourse is important to many young adults, and there is some likelihood that psychological problems will arise.
Disorders related to sexual activity are also relatively common.
Among the disorders that may occur in women are salpingitis and vaginitis, both of which may cause sexual intercourse to be painful. Gastrointestinal problems affecting this age group include appendicitis, Crohn's disease, and ulcerative colitis. Usually, only the first symptoms of Crohn's disease and ulcerative colitis occur early in adult life. Infectious hepatitis may develop and occurs most commonly in local epidemics. Cancer in any form is rare.