Diseases and Conditions

Obesity is a complex, and increasingly common disease that is associated with many health risks such as high blood pressure,…

Obsessive-Compulsive Disorder (OCD) is an anxiety disorder that causes unwanted thoughts and repetitive behaviors.

Work can be a dangerous place if you are exposed to hazardous toxins. Certain substances put you at risk for…

An opioid addiction is a powerful urge to use opioids. These are medicines that are prescribed to relieve pain, such…

Oppositional defiant disorder, or ODD, is a behavior condition that affects children and teens. Those who have it are angry,…

Organic acid metabolism disorders are a group of rare birth defects. They affect your ability to break down food into…

Osgood-Schlatter disease is one of the most common causes of knee pain in young children and athletes. It can affect…

Arthritis is swelling of the joints. It’s painful and can limit your movement. There are many kinds of arthritis. Osteoarthritis…

Osteochondritis dissecans is a joint problem. It occurs when an area of bone under a piece of cartilage in the…

Osteopenia is a condition that begins as you lose bone mass and your bones get weaker.

Osteoporosis is a disease of the bones and often occurs in older women.

Osteosarcoma is a bone cancer that most often affects people between the ages of 10 and 20. It usually begins…

Swimmer’s ear, also known as otitis externa, is an irritation, swelling or infection in your ear. It can be caused…

Otitis media with effusion means there is fluid in the middle ear. It is common in young children and usually…

Ovarian cancer is cancer in one or both ovaries. Ovaries are small organs located on each side of a women’s…

An ovarian cyst is a fluid-filled sac in or on a person’s ovary. It is very common. Many times, these…

Overactive bladder is a condition that causes you to lose control of your bladder without warning.