Human nose the Japanese invasions of Korea from 1592 to 1598. The septal cartilage can be destroyed through repeated nasal inhalation of drugs such as cocaine. This in turn can lead to more widespread collapse of the nasal skeleton. Nose-picking is a common, mildly taboo habit. Medical risks include the spread of infections, nosebleeds and, rarely, perforation of the nasal septum. When it becomes compulsive it is termed rhinotillexomania. The wiping of the nose with the hand, commonly referred to as the "allergic salute", is also mildly taboo and can result in the spreading of infections as well. Habitual as well as
Biology of obsessive–compulsive disorder (ArKO), who lack a functional enzyme to convert androgens to estrogen. This ArKO knockout strategy has provided a model to examine the physiological impact of lower than normal amounts of estrogen. Studies with ArKO mice have been used to show that varying levels of estrogen affect the onset of Obsessive Compulsive Disorder (OCD) behaviors. Lower amounts of estrogen are associated with an increase of OCD behaviors in males more than females. Variation in estrogen can lead to increased levels of OCD symptoms within women as well. The disorder itself has a later onset in women, and tends to show two