This rare genetic disorder triggers a severe reaction to certain anesthesia drugs, causing rigid muscles, high fever, fast heart rate and rapid breathing.
Disease
Asthma attack
Learn how to recognize when you need to use quick-relief treatment or get emergency care.
Disease
Kawasaki disease
Learn more about this condition that mainly affects young children and causes swelling, called inflammation, in the walls of the arteries throughout the body.
Disease
Congenital heart disease in adults
A heart condition you're born with may not cause symptoms until adulthood. Learn how adult congenital heart disease is treated and why follow-up care is important.
Disease
X-linked agammaglobulinemia
This immune system condition, found mainly in males, leads to repeat infections that are hard to treat.
Disease
Fever
Medications can lower a fever, but sometimes it's better left untreated. Fever may play a role in helping your body fight off infections.
Disease
Systemic mastocytosis
Too many mast cells can build up in skin, bone and organs. When triggered, the cells let out chemicals that can cause allergic reactions and organ damage.
Disease
Drug allergy
Learn which medicines are more likely to cause an allergic reaction, what symptoms look like and what treatments can calm such a reaction.
Disease
Heart murmurs
An irregular heart sound may be harmless or worrisome. Know the causes of heart murmurs and when treatment is needed.
Disease
Phenylketonuria (PKU)
PKU is caused by a change in the gene that helps create an enzyme needed to break down phenylalanine. Treatment includes a special diet and medication.
Disease
Sarcoidosis
This treatable inflammatory condition causes growth of tiny granulomas in different parts of the body, including the lungs, eyes, skin and heart.
Disease
Pneumonia
Pneumonia — Learn about the symptoms, causes and treatment of this serious lung infection.