Coarctation of the aorta symptoms depend on how much of the aorta is narrowed. Most people don't have symptoms. Mild coarctation may not be diagnosed until adulthood. Babies with severe coarctation of the aorta may show symptoms shortly after birth. Symptoms of coarctation of the aorta in infants include: 
Difficulty breathing
Difficulty feeding
Heavy sweating
Irritability
Pale skin
 Symptoms of coarctation of the aorta after infancy commonly include: 
Chest pain
Headaches
High blood pressure
Leg cramps or cold feet
Muscle weakness
Nosebleeds
 Depending on where the coarctation is located, blood pressure may be high in the arms and low in the legs and ankles. Coarctation of the aorta often occurs with other heart defects. Other symptoms depend on the type of congenital heart defect.