The ages between 12 to 24 are challenging for almost all youth. The biological, social, physical and psychological path to adulthood is not easy, even under the best of circumstances. But coupled with that tough journey is the fact that 75 per cent of all mental health disorders first show up in these teen/young adult years, too. For the majority, the mental health issue is apt to be mild to moderate anxiety or depression; both highly treatable.

A number of other very important mental health issues, however, also tend to arise first in the teen years. Here is some general information and links to resources for two specific issues: eating disorders and obsessive-compulsive disorder.

In all cases, if you suspect your child might be suffering from a specific condition talk to your family doctor.

Eating disorders: The transition from adolescence to adulthood is particularly risky for the development of anorexia nervosa (AN) and bulimia nervosa (BN). An estimated 0.9 per cent of young women aged 12 to 24 will develop AN, while about 1.5 per cent of young women develop BN. While young women are three times more likely to develop these disorders, young men in recent years are increasingly showing to have eating issues.

While our societal obsession with thinness may set the scene; genetic risk factors, as well as underlying anxiety, perfectionism and self-esteem issues are thought to combine to trigger the disorders. Once anorexia starts and the body gets into starvation mode, the brain chemistry changes. As well, the body鈥檚 dehydration, altered electrolyte balance and poor nutritional status can lead to heart rhythm issues and other organ function problems. The goal in treating anorexia is to re-feed the person to a healthier weight, and then treat the disordered thinking behind the condition, with one or more of the most effective treatments. These treatments include cognitive behavioural therapy (CBT), family-based therapy and dialectic behaviour therapy (DBT). Re-feeding and psychotherapy may co-occur once the person is progressing to a healthier weight. With bulimia, along with CBT, antidepressant medication has been shown to be helpful. In both conditions, medications may be helpful if there is a co-occurring mood or anxiety disorder, as is often the case.

Symptoms of AN to look for in your teen include rapid or significant weight loss, food restriction and obsession with calories or exercise. For BN, weight loss may not be very apparent, but your teen may go to the washroom immediately after eating and run the water. You may see evidence of vomiting in the toilet bowl.

Since anorexia has the highest mortality rate of any psychiatric illness, it is important to seek help at the first signs. For more information and to see a full listing of provincial programs, see Kelty Eating Disorders, keltyeatingdisorders.ca. Another source for information is the National Eating Disorders Information Centre, nedic.ca.

Obsessive-Compulsive Disorder (OCD): Obsessions are repetitive, intrusive and unwanted thoughts that cause the affected youth great anxiety. Compulsions are the actions or the rituals that he or she must go through to reduce the anxiety caused by the obsessive thoughts.

A very common OCD obsession is about contamination or germs, with the compulsion being the need to hand wash repeatedly or avoid any surface, individual or situation where germs might be present. Another common OCD obsession is the fear that something terrible will happen unless the youth takes a specific ritualistic action, like counting, checking, or placing items in a specific order.

Genetic risk factors plus an environmental trigger are thought to set off the illness, which tends to run in families. One environmental trigger that may be linked to sudden onset OCD symptoms in some susceptible children is a recent infection with Streptococcus A bacteria (Strep throat.) This burgeoning, but controversial area of research may yield more insights in future years.

Left untreated, however, OCD can be very debilitating. The longer the OCD goes on, the harder it is to treat.  Again, if you are worried about possible signs of OCD in your child, see your family doctor. For more information, see at ocdbc.ca, www.keltymentalhealth.ca or the OCD pages at cmha.ca