Infant and toddler health
Learning Center
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.
Restless legs syndrome
Uncomfortable sensations in your legs can interrupt your sleep — making you drag through your day. These therapies calm the restlessness and improve sleep.
Pink eye (conjunctivitis)
This highly contagious eye condition can be itchy and uncomfortable. But much like the common cold, it rarely requires medicine or staying home.
Separation anxiety disorder
Intense or prolonged separation anxiety that interferes with school or other daily activities or includes panic attacks. Learn about treatment.
Mayo Clinic Minute: Are you keeping your child as safe as possible in the car?
Find out how long to use a rear-facing car seat and how it can protect your child.
Multisystem inflammatory syndrome in children (MIS-C) and COVID-19
Learn about symptoms of MIS-C, a serious condition linked to coronavirus disease 2019 (COVID-19). Get help fast if your child shows any signs.
Anxiety disorders
Learn the symptoms of this mental health condition, and ways to manage worry and fear that interfere with your daily activities.
Marfan syndrome
This inherited disorder affects the skeleton and the eyes. It can also harm the large blood vessel that carries blood from the heart to the rest of the body.
Bicuspid aortic valve
This condition, present at birth, affects the valve between the lower left heart chamber and the body's main artery. Know the symptoms and treatment.
Vascular rings
Learn more about this condition in which malformations of the aortic arch encircle the windpipe and esophagus and can press against them.
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