Did you know that big and important changes are happening in the brain during adolescence? Here are 7 things to know about the teen brain.

Raising a child can be challenging. Even under the best circumstances, their behaviors and emotions can change frequently and rapidly. All children are sad, anxious, irritable, or aggressive at times, or they occasionally find it challenging to sit still, pay attention, or interact with others. In most cases, these are just typical developmental phases. However, such behaviors may indicate a more serious problem in some children.

Suicidal thoughts or behaviors are more common than suicide deaths and are signs of extreme distress. Suicidal thoughts and behaviors are not harmless bids for attention and should not be ignored. Here are some of the signs and risk factors, and what you can do for yourself or someone else in distress.

A mental health disorder characterized by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life.

Teen depression is a serious mental health problem that causes a persistent feeling of sadness and loss of interest in activities. It affects how your teenager thinks, feels and behaves, and it can cause emotional, functional and physical problems. Although depression can occur at any time in life, symptoms may be different between teens and adults.

Patients with chronic medical conditions may provoke feelings of anxiety and professional inadequacy.

Bipolar disorder, formerly called manic depression, is a mental health condition that causes extreme mood swings that include emotional highs (mania or hypomania) and lows (depression). When you become depressed, you may feel sad or hopeless and lose interest or pleasure in most activities.

Does your child go through extreme changes in mood and behavior? Does your child get much more excited or much more irritable than other kids? Do you notice that your child goes through cycles of extreme highs and lows more often than other children? Do these mood changes affect how your child acts at school or at home? Some children and teens with these symptoms may have bipolar disorder.

Disruptive mood dysregulation disorder (DMDD) is a childhood condition of extreme irritability, anger, and frequent, intense temper outbursts. DMDD symptoms go beyond a being a “moody” child—children with DMDD experience severe impairment that requires clinical attention.

Grief is the response to loss, particularly to the loss of someone or some living thing that has died, to which a bond or affection was formed. Although conventionally focused on the emotional response to loss, grief also has physical, cognitive, behavioral, social, cultural, spiritual and philosophical dimensions.

A disorder in which a person has difficulty recovering after experiencing or witnessing a terrifying event. The condition may last months or years, with triggers that can bring back memories of the trauma accompanied by intense emotional and physical reactions.

When people think of trauma, they often focus on physical injuries. However, people also can experience psychological trauma after witnessing or experiencing distressing events. Trauma can be caused by natural disasters such as hurricanes, earthquakes, and floods. It also can be caused by acts of violence—such as terrorist attacks and mass shootings—as well as motor vehicle and other accidents.

A mental health disorder characterized by feelings of worry, anxiety, or fear that are strong enough to interfere with one's daily activities.

A chronic mental health condition in which social interactions cause irrational anxiety.

Panic disorder is a type of anxiety disorder. It causes panic attacks, which are sudden feelings of terror when there is no real danger. You may feel as if you are losing control.

Stress is a feeling of emotional or physical tension. It can come from any event or thought that makes you feel frustrated, angry, or nervous. Stress is your body's reaction to a challenge or demand.

Obsessive-compulsive disorder (OCD) is a disorder in which people have recurring, unwanted thoughts, ideas or sensations (obsessions) that make them feel driven to do something repetitively (compulsions).

Attention deficit hyperactivity disorder (ADHD) is a mental health disorder that can cause above-normal levels of hyperactive and impulsive behaviors. People with ADHD may also have trouble focusing their attention on a single task or sitting still for long periods of time. Both adults and children can have ADHD.

Schizophrenia is a serious mental illness that affects how a person thinks, feels, and behaves. People with schizophrenia may seem like they have lost touch with reality, which causes significant distress for the individual, their family members, and friends.

An eating disorder is a serious mental illness, characterised by eating, exercise and body weight or shape becoming an unhealthy preoccupation of someone's life.

Drug addiction, also called substance use disorder, is a disease that affects a person's brain and behavior and leads to an inability to control the use of a legal or illegal drug or medication. Substances such as alcohol, marijuana and nicotine also are considered drugs. When you're addicted, you may continue using the drug despite the harm it causes.