Oppositional Defiant Disorder (ODD) is a behavioral disorder typically diagnosed in childhood or adolescence. It is characterized by a persistent pattern of angry, irritable mood, argumentative or defiant behavior, and vindictiveness toward authority figures. These behaviors go beyond typical childhood misbehavior and can significantly interfere with family life, school performance, and social relationships. Symptoms Symptoms of ODD are usually grouped …

Ocular rosacea is a chronic inflammatory condition that affects the eyes and eyelids and is commonly associated with rosacea of the skin. It can cause irritation, redness, and discomfort in the eyes and may occur even without obvious facial skin symptoms. Early recognition is important, as untreated ocular rosacea can lead to persistent eye problems and, in severe cases, vision …

Childhood sleep apnea is a common condition that causes a pause in your child’s breathing pattern while they sleep. Your child’s breathing changes due to an obstruction or blockage in their airway or because their brain isn’t communicating with their breathing muscles. When your child’s brain senses changes to their body’s air intake, it’ll signal their lungs to breathe. This may cause your child to wake …

Obstructive Sleep Apnea (OSA) is a common sleep-related breathing disorder in which the upper airway repeatedly becomes partially or completely blocked during sleep. These interruptions cause breathing to stop and start multiple times throughout the night, leading to poor sleep quality and reduced oxygen levels. OSA can affect both adults and children and is associated with significant health risks if …

Obsessive-Compulsive Disorder (OCD) is a chronic mental health condition characterized by persistent, unwanted thoughts known as obsessions and repetitive behaviors or mental acts called compulsions. These obsessions and compulsions can interfere significantly with daily life, work, and relationships. OCD affects people of all ages and is not simply a habit or personality trait but a recognized psychiatric disorder that often …

Obesity is a chronic medical condition characterized by excessive accumulation of body fat that increases the risk of health problems. It is commonly assessed using body mass index (BMI), where a BMI of 30 or higher is classified as obesity. Obesity is a complex condition influenced by genetic, behavioral, environmental, and metabolic factors, and it affects people of all ages …

Overactive bladder (OAB) is a condition characterized by a sudden, uncontrollable urge to urinate, often accompanied by frequent urination and, in some cases, urinary incontinence. OAB is caused by involuntary contractions of the bladder muscles and can affect adults of any age, though it is more common in older individuals. The condition can impact daily life, work, and social activities. …

Norovirus infection is a highly contagious viral illness that affects the stomach and intestines, causing inflammation and irritation. It is a common cause of gastroenteritis, leading to vomiting, diarrhea, and stomach cramps. Norovirus spreads easily through contaminated food, water, surfaces, or close contact with infected individuals. The infection can affect people of all ages and often occurs in crowded settings …

Noonan syndrome is a genetic disorder that affects normal development in various parts of the body. It is characterized by distinctive facial features, short stature, heart defects, and other physical and developmental differences. Noonan syndrome can affect people of all genders and ethnic backgrounds and is often diagnosed in infancy or early childhood, though mild cases may be identified later …

Nonmelanoma skin cancer refers to a group of skin cancers that develop from cells other than melanocytes, most commonly basal cell carcinoma and squamous cell carcinoma. These cancers typically arise on sun-exposed areas of the body, such as the face, ears, neck, scalp, and hands. Nonmelanoma skin cancers are the most common cancers worldwide and usually grow slowly. With early …