Health Library

Mood Disorders in Children and Adolescents

Detailed information on the most common types of mood disorders, including major depression, manic depression (bipolar disorder), dysthymia, seasonal affective disorder, and suicide

Mood Disorders in Teens

Anyone can feel sad or depressed at times. But mood disorders are more intense. They are harder to handle than normal feelings of sadness. Read on to learn more about these types of disorders in teens.

Mosaic Down Syndrome

Detailed information on mosaic Down syndrome, including the chances for it to happen again in a family

Motor Vehicle Safety Overview

Detailed information on motor vehicle safety, including installing and using child safety seats and booster seats

Mouthguards

Mouthguards are important to help protect your child's mouth and teeth from serious injury.

MRSA Infection in Children

MRSA is an infection that can be life-threatening if it spreads from the skin to the lungs, the bloodstream, or other organs. MRSA infection can be hard to treat.

Mumps in Children

Mumps is a very contagious viral illness that infects the pair of salivary glands in front of the ears. Cases of mumps in the U.S. happen much less often since the mumps vaccine has been used.

Muscle and Joint Injuries

Detailed information on muscle and joint injuries, including prevention

Muscular Dystrophy

Muscular dystrophy causes the muscles in the body to become very weak. The muscles break down and are replaced with fatty deposits over time.

Mushroom Poisoning in Children

Mushroom poisoning happens when a child eats a mushroom that has poisons (toxins). Here's what you need to know, from symptoms to diagnosis and treatment.

Myasthenia Gravis (MG) in Children

Myasthenia gravis (MG) is a disorder that causes weakness in muscles around the body. This happens because antibodies destroy some of the places where nerves and muscles meet. It mostly affects the eyes, mouth, throat, arms, and legs.

Myasthenia Gravis and Pregnancy

Myasthenia gravis is a complex autoimmune disorder. It causes antibodies to destroy the connections between your muscles and nerves. This causes muscle weakness and tiredness.